| 单词 | compound |
| 释义 | compound (once / 297 pages) 1nadjv 2n 3v 4v If you compound a problem you add something to it to make it worse, like say, putting water on a grease fire. Compound means to combine; a compound is a combination or mixture of two or more things. Compound has several specialized uses. A compound is either a mixture or two or more things, or a heavily guarded residence, such as a drug lord might have. In botany, a compound leaf consists of more than one part. In linguistics, a compound is a word that consists of two or more independent words. In chemistry, a compound is a substance created when atoms from chemical elements join together. WORD FAMILYcompound: compounded, compounding, compoundly, compounds, decompound+/compounded: uncompounded/compounding: compoundings USAGE EXAMPLESCompounds like nitrous oxide are powerful greenhouse gases. BBC(Jan 01, 2017) Obama also shuttered two Russian compounds in Maryland and New York. Seattle Times(Jan 01, 2017) Cheese proteins contain casomorphins, chemical compounds that attach to the same opiate receptors in the brain as heroin or morphine. New York Times(Dec 28, 2016) 1 1n a whole formed by a union of two or more elements or parts Hyper whole all of something including all its component elements or parts 2n (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight Syn|Hypo|Hyper chemical compound vanillin a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings acceptor(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated adducta compound formed by an addition reaction antiknockany of various compounds that are added to gasoline to reduce engine knocking acidany of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt arsenidea compound of arsenic with a more positive element hydrogen cyanidea highly poisonous gas or volatile liquid that smells like bitter almonds; becomes a gas at around 90 degree Fahrenheit and is most dangerous when inhaled; the anhydride of hydrocyanic acid; used in manufacturing anionic compounda compound characterized by an active anion alkali, baseany of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water binary compoundchemical compound composed of only two elements taurinea colorless crystalline substance obtained from the bile of mammals chromogena compound that can be converted to a pigment manganese tetroxidean oxide of manganese found naturally as hausmannite monomera simple compound whose molecules can join together to form polymers ozonideany of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound organic compoundany compound of carbon and another element or a radical amminea complex inorganic compound that contains ammonia molecules anhydridea compound formed from one or more other compounds in a reaction resulting in removal of water azidea chemical compound containing the azido group combined with an element or radical bitter principleany one of several hundred compounds having a bitter taste; not admitting of chemical classification buffer(chemistry) an ionic compound that resists changes in its pH calcium-cyanamide, cyanamidea compound used as a fertilizer and as a source of nitrogen compounds carbonyla compound containing metal combined with carbon monoxide carbon disulfidea toxic colorless flammable liquid (CS2); used in the manufacture of rayon and cellophane and carbon tetrachloride and as a solvent for rubber cofactora substance (as a coenzyme) that must join with another to produce a given result cementite, iron carbidea chemical compound that is a constituent of steel and cast iron; very hard and brittle chloropicrin, nitrochloroforma heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas complex, coordination compounda compound described in terms of the central atom to which other atoms are bound or coordinated allomorphany of several different crystalline forms of the same chemical compound corrosivea substance having the tendency to cause corrosion (such a strong acids or alkali) aluminatea compound of alumina and a metallic oxide defolianta chemical that is sprayed on plants and causes their leaves to fall off depilatorya chemical (usually a sulfide) used to remove hair or wool or bristles from hides derivativea compound obtained from, or regarded as derived from, another compound dimera compound whose molecules are composed of two identical monomers fixer, fixing agenta chemical compound that sets or fixes something (as a dye or a photographic image) flavonea colorless crystalline compound that is part of a number of white or yellow plant pigments formulation, preparationa substance prepared according to a formula enantiomer, enantiomorpheither one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical exotherma compound that gives off heat during its formation and absorbs heat during its decomposition goitrogenany substance (such as thiouracil) that induces the formation of a goiter benzofuran, coumarone, cumaronea colorless oily compound extracted from coal tar and used in manufacturing synthetic resins synthetic, synthetic substancea compound made artificially by chemical reactions hydrateany compound that contains water of crystallization hydroxidea chemical compound containing the hydroxyl group incensea substance that produces a fragrant odor when burned inorganic compoundany compound that does not contain carbon repellant, repellenta chemical substance that repels animals repellant, repellenta compound with which fabrics are treated to repel water iodocompounda compound containing the covalent iodine radical isomera compound that exists in forms having different arrangements of atoms but the same molecular weight hydrated oxide, hydroxidea compound of an oxide with water menthola crystalline compound that has the cool and minty taste and odor that occurs naturally in peppermint oil; used as a flavoring and in medicine to relieve itching, pain, and nasal congestion nitrogen mustarda toxic compound resembling mustard gas in structure; important in cancer treatment nitridea compound containing nitrogen and a more electropositive element (such as phosphorus or a metal) oxideany compound of oxygen with another element or a radical polymera naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers preservativea chemical compound that is added to protect against decay or decomposition benzoquinone, quinoneany of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes salta compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal) causticany chemical substance that burns or destroys living tissue nitrateany compound containing the nitrate group (such as a salt or ester of nitric acid) chlorideany compound containing a chlorine atom heterocycle, heterocyclic, heterocyclic compounda compound containing a heterocyclic ring silicideany of various compounds of silicon with a more electropositive element or radical siloxaneany of a large class of compounds that have alternate silicon and oxygen atoms solvatea compound formed by solvation (the combination of solvent molecules with molecules or ions of the solute) sternutator, sternutatorya chemical substance that causes sneezing and coughing and crying strippera chemical compound used to remove paint or varnish sulfide, sulphidea compound of sulphur and some other element that is more electropositive tellurideany binary compound of tellurium with other more electropositive elements tenderiser, tenderizera substance (as the plant enzyme papain) applied to meat to make it tender tetrachlorideany compound that contains four chlorine atoms per molecule triazineany of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring U308, yellowcakean impure mixture of uranium oxides obtained during the processing of uranium ore enamela colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection pregnanediola compound found in women's urine during certain phases of the menstrual cycle and in the urine of pregnant women cleaner, cleanser, cleansing agenta preparation used in cleaning something aldehydeany of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids alcapton, alkapton, homogentisic acidan acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine Plasticinea synthetic material resembling clay but remaining soft; used as a substitute for clay or wax in modeling (especially in schools) acetate, ethanoatea salt or ester of acetic acid lead tetraethyl, tetraethyl leada clear oily poisonous liquid added to gasoline to prevent knocking aliphatic compoundorganic compound that is an alkane or alkene or alkyne or their derivative alkylbenzeneorganic compound that has an alkyl group bound to a benzene ring alkyl halide, haloalkaneorganic compound in which halogen atoms have been substituted for hydrogen atoms in an alkane amino acid, aminoalkanoic acidorganic compounds containing an amino group and a carboxylic acid group citratea salt or ester of citric acid diamineany organic compound containing two amino groups enolan organic compound that contains a hydroxyl group bonded to a carbon atom which in turn is doubly bonded to another carbon atom arsenatea salt or ester of arsenic acid arsenic acidan acid formed from arsenic pentoxide cerotic acid, hexacosanoic acida white solid fatty acid found in waxes (such as beeswax) chlorateany salt of chloric acid chloric acid(HClO3) a strong unstable acid with an acrid odor found in chlorate salts chlorous acid(HClO2) a strongly oxidizing acid; known only in solution monobasic acidan acid containing only one replaceable hydrogen atom per molecule dibasic acidan acid containing two replaceable hydrogen atoms per molecule dibasic salta salt derived by replacing two hydrogen atoms per molecule tribasic acidan acid containing three replaceable hydrogen atoms per molecule tetrabasic acidan acid containing four replaceable hydrogen atoms per molecule fulminic acid(CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid gamma acida crystalline acid used to make azo dyes hydriodic acid(HI) a colorless or yellow aqueous solution of hydrogen iodide hydrocyanic acid, prussic acida solution of hydrogen cyanide in water; weak solutions are used in fumigating and in the synthesis of organic compounds hydroxy acidany acid that has hydroxyl groups in addition to the hydroxyl group in the acid itself hypochloriteany salt or ester of hypochlorous acid hyponitrous acidan explosive white crystalline weak acid (H2N2O2) lysergic acida crystalline acid often used in medical research; obtained from ergotic alkaloids manganic acida dibasic acid (H2MnO4) found only in solution and in manganate salts pyrophosphatea salt or ester of pyrophosphoric acid 2-methylpropenoic acid, methacrylic acidan unsaturated acid (C4H6O2) used to make resins and plastics selenic acida strong acid (H2SeO4) analogous to sulfuric acid sulfonatea salt of sulphonic acid sulfonic acid, sulphonic acidan acid derived from sulphuric acid titanic acida white weak acid that is a hydrated form of titanium dioxide titania, titanic oxide, titanium dioxide, titanium oxidea white powder used as a pigment for its high covering power and durability chelate, chelate compounda heterocyclic compound having a metal ion attached by coordinate bonds to at least two nonmetal ions halona compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer phosphora synthetic substance that is fluorescent or phosphorescent; used to coat the screens of cathode ray tubes common salt, sodium chloridea white crystalline solid consisting mainly of sodium chloride (NaCl) lactatea salt or ester of lactic acid perchloratea salt of perchloric acid perchloric acida powerful oxidizing agent; forms perchlorates pentoxidean oxide containing five atoms of oxygen in the molecule peptoneany of various water-soluble compounds that form by hydrolysis in the digestion of proteins to amino acids quaternary ammonium compounda compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs proenzyme, zymogenany of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active propylthiouracila crystalline compound used as an antithyroid drug in the treatment of goiter pyridinea toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal pyritesany of various metallic-looking sulfides (of which pyrite is the commonest) purinea colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances purineany of several bases that are derivatives of purine etherany of a class of organic compounds that have two hydrocarbon groups linked by an oxygen atom acetalany organic compound formed by adding alcohol molecules to aldehyde molecules aldehyde-alcohol, aldolan oily colorless liquid obtained by the condensation of two molecules of acetaldehyde; contains an alcohol group (-OH) and an aldehyde group (-CHO) alkalia mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture alkaloidnatural bases containing nitrogen found in plants amideany organic compound containing the group -CONH2 renneta substance that curdles milk in making cheese and junket azadirachtininsecticide carboxylic acidan organic acid characterized by one or more carboxyl groups aminobenzoic acida derivative of benzoic acid ammoniaa pungent gas compounded of nitrogen and hydrogen (NH3) ammonium chloride, sal ammoniaca white salt used in dry cells stercobilinogen, urobilinogena chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine aqua fortis, nitric acidacid used especially in the production of fertilizers and explosives and rocket fuels nitrous acidan unstable inorganic acid known only in solution and as nitrite salts nitrogen oxideany of several oxides of nitrogen formed by the action of nitric acid on oxidizable materials; present in car exhausts aqua regia, nitrohydrochloric acida yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold) acetic anhydridea compound that is needed in order to refine opium into heroin phthalic anhydridea white cyclic anhydride hydrazoitea salt of hydrazoic acid thiazinea compound made up of a ring of four carbon atoms and one sulfur atom and one nitrogen atom barbituric acid, malonylureaa white crystalline acid derived from pyrimidine; used in preparing barbiturate drugs benzoateany salt or ester of benzoic acid Prevacid, lansoprazoleantacid (trade name Prevacid) that suppresses acid secretion in the stomach boratea salt or ester of boric acid boracic acid, boric acidany of various acids containing boron and oxygen boric acid, orthoboric acida white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative borosilicatea salt of boric and silicic acids bromic acidan unstable acid used as an oxidizing agent cacodyl, tetramethyldiarsinea poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air calcium carbidea grey salt of calcium (CaC) used in making acetylene calcium lactatea white crystalline salt made by the action of lactic acid on calcium carbonate; used in foods (as a baking powder) and given medically as a source of calcium calcium nitratea deliquescent salt that is soluble in water; sometimes used as a source of nitrogen in fertilizers burnt lime, calcined lime, calcium oxide, calx, fluxing lime, lime, quicklime, unslaked limea white crystalline oxide used in the production of calcium hydroxide calcium octadecanoate, calcium stearatean insoluble calcium salt of stearic acid and palmitic acid; it is formed when soap is mixed with water that contains calcium ions and is the scum produced in regions of hard water carbamatea salt (or ester) of carbamic acid carbamic acidan acid that is known only by virtue of its salts (as ammonium carbamate) or its esters (as urethane) carbidea binary compound of carbon with a more electropositive element cellulose nitrate, guncotton, nitrocellulose, nitrocottona nitric acid ester; used in lacquers and explosives carbolic acid, hydroxybenzene, oxybenzene, phenol, phenylic acida toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally carbon tet, carbon tetrachloride, perchloromethane, tetrachloromethanea colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined carbonatea salt or ester of carbonic acid (containing the anion CO3) fulminatea salt or ester of fulminic acid carbonic acida weak acid known only in solution; formed when carbon dioxide combines with water neurochemicalany organic substance that occurs in neural activity acid anhydrides, acyl anhydridesorganic compounds that react with water to form an acid acid halide, acyl halideorganic compounds containing the group -COX where X is a halogen atom chromic acidan unstable acid known only in solution and as chromate salts chromateany salt or ester of chromic acid citric acida weak water-soluble acid found in many fruits (especially citrus fruits); used as a flavoring agent hydrochloridea complex consisting of an organic base in association with hydrogen chloride copper oxidean oxide of copper aluminium hydroxide, aluminum hydroxide, hydrated aluminium oxide, hydrated aluminum oxidewhite crystalline compound that occurs naturally as the mineral gibbsite coal-tar creosote, creosotea dark oily liquid obtained by distillation of coal tar; used as a preservative for wood creosotea colorless or yellowish oily liquid obtained by distillation of wood tar; used as an antiseptic cyanamid, cyanamidea weak soluble dibasic acid (the parent acid of cyanamide salts) cyanic acida colorless poisonous volatile liquid acid that hydrolyzes readily to ammonia and carbon dioxide cyanidean extremely poisonous salt of hydrocyanic acid cyanide, nitril, nitrileany of a class of organic compounds containing the cyano radical -CN cyanohydrinany organic compound in which the cyano radical -CN and the hydroxyl radical -OH are attached to the same carbon atom cyanuric acida trimer of cyanic acid DNA, deoxyribonucleic acid, desoxyribonucleic acid(biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information RNA, ribonucleic acid(biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell dioxidean oxide containing two atoms of oxygen in the molecule H2O, waterbinary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent esterformed by reaction between an acid and an alcohol with elimination of water soda niter, sodium nitrate(NaNO3) used especially as a fertilizer and explosive niter, nitre, potassium nitrate, saltpeter, saltpetre(KNO3) used especially as a fertilizer and explosive potassium bromidea white crystalline salt (KBr) used as a sedative and in photography potassium chloratea white salt (KClO3) used in matches, fireworks, and explosives; also used as a disinfectant and bleaching agent potassium dichromatean orange-red salt used in making dyes and in photography ferric oxidea red oxide of iron ferricyanic acida brown unstable acid formed from ferricyanide ferricyanidesalt of ferricyanic acid obtained by oxidation of a ferrocyanide ferrocyanic acida white unstable acid formed from ferrocyanide salts ferrocyanidesalt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate fixativea compound (such as ethanol or formaldehyde) that fixes tissues and cells for microscopic study fluoroboric acidan acid of fluorine and boron fluoroboridea salt of fluoroboric acid fluosilicatesalt of fluosilicic acid fluosilicic acid, hydrofluosilicic acidan unstable poisonous corrosive acid known primarily in the form of its salts formic acida colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigants fumaric acida colorless crystalline acid with a fruity taste; used in making polyester resins furan, furane, furfurana colorless toxic flammable liquid used in the synthesis of nylon gallic acida colorless crystalline acid obtained from tannin glutamatea salt or ester of glutamic acid glyceric acida syrupy acid obtained by oxidation of glycerol or glyceraldehyde glycerinated gelatina gelatinous preparation made from gelatin and glycerin and water; used as a base for ointments and suppositories Nitrospan, Nitrostat, glyceryl trinitrate, nitroglycerin, nitroglycerine, trinitroglycerina heavy yellow poisonous oily explosive liquid obtained by nitrating glycerol; used in making explosives and medically as a vasodilator (trade names Nitrospan and Nitrostat) glycosidea group of compounds derived from monosaccharides glycolic acid, glycollic acid, hydroxyacetic acida translucent crystalline compound found in sugar cane and sugar beets and unripe grapes resin, rosinany of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules synthetic resina resin having a polymeric structure; especially a resin in the raw state; used chiefly in plastics copolymera polymer consisting of two or more different monomers polyurethan, polyurethaneany of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives or plastics or paints or rubber halidea salt of any halogen acid halocarbonone of various compounds of carbon and any of the halogens hemiacetalan organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketones erythrocytolysin, erythrolysin, haemolysin, hemolysinany substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin humic substancean organic residue of decaying organic matter hydrideany binary compound formed by the union of hydrogen and other elements hydrobromic acidan aqueous solution of hydrogen bromide that is a strong liquid acid hydrocarbonan organic compound containing only carbon and hydrogen chlorohydric acid, hydrochloric acidan aqueous solution of hydrogen chloride; a strongly corrosive acid hydrogen chloridea colorless corrosive gas (HCl) hydrofluoric acida weak poisonous liquid acid; formed by solution of hydrogen fluoride in water hydroiodic acidan acid formed by aqueous solution of hydrogen iodide hydrogen sulfidea sulfide having the unpleasant smell of rotten eggs hypo, sodium thiosulfate, sodium thiosulphatea compound used as a fixing agent in photographic developing hypochlorous acida weak unstable acid known only in solution and in its salts; used as a bleaching agent and as an oxidizing agent glyoxaline, imidazole, iminazolean organic base C3H4N2; a histamine inhibitor insect repellant, insect repellent, insectifugea chemical substance that repels insects iodic acida soluble crystalline acid; used as a reagent and disinfectant iron disulfidea compound containing two atoms of sulfur combined with iron isocyanatea salt or ester of isocyanic acid isocyanic acidan acid known only in the form of its esters itaconic acida crystalline carboxylic acid; occurs in some fermentations of sugars joss sticka slender stick of incense burned before a joss by the Chinese ketoneany of a class of organic compounds having a carbonyl group linked to a carbon atom in each of two hydrocarbon radicals lignina complex polymer; the chief constituent of wood other than carbohydrates; binds to cellulose fibers to harden and strengthen cell walls of plants calcium hydrate, calcium hydroxide, caustic lime, hydrated lime, lime, lime hydrate, slaked limea caustic substance produced by heating limestone calcium chloridea deliquescent salt; used in de-icing and as a drying agent calcium sulfate, calcium sulphatea white salt (CaSO4) lyea strong solution of sodium or potassium hydroxide macromolecule, supermoleculeany very large complex molecule; found only in plants and animals magnesium hydroxidea white crystalline powder used chiefly in medicines magnesium nitridea nitride containing nitrogen and magnesium maleic acida colorless crystalline compound found in unripe fruit (such as apples or tomatoes or cherries) and used mainly to make polyester resins manganatea salt of manganic acid containing manganese as its anion cyanuramide, melaminea white crystalline organic base; used mainly in making melamine resins calomel, mercurous chloridea tasteless colorless powder used medicinally as a cathartic monohydratea hydrate that contains one molecule of water per molecule of the compound monoxidean oxide containing just one atom of oxygen in the molecule chrome aluma violet-colored salt used in hide tanning and as a mordant in dyeing tartratea salt or ester of tartaric acid nebulaa medicinal liquid preparation intended for use in an atomizer nitrobenzenea poisonous oily water-soluble liquid used as a solvent and in the manufacture of aniline polyamide, polymeric amidea polymer containing repeated amide groups oxalacetate, oxaloacetatea salt or ester of oxalacetic acid oxalacetic acid, oxaloacetic acidan acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates) oxalatea salt or ester of oxalic acid ethanedioic acid, oxalic acida toxic colorless crystalline organic acid found in oxalis and other plants; used as a bleach and rust remover and in chemical analysis oximeany compound containing the group -C=NOH oxyacid, oxygen acidany acid that contains oxygen pantothen, pantothenic acida vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods PABA, para aminobenzoic acida metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers pectic acida complex acid that occurs in ripe fruit and some vegetables permanganatea dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic permanganic acidan unstable purple acid (HMnO4) known only in solution or of permanganate salts peroxidean inorganic compound containing the divalent ion -O-O- petrochemicalany compound obtained from petroleum or natural gas inorganic phosphate, orthophosphate, phosphatea salt of phosphoric acid creatine phosphate, creatine phosphoric acid, phosphocreatinean organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction phthalic acida colorless acid used to make dyes and perfumes picric acida yellow toxic highly explosive strong acid; used in high explosives and as a dye and in chemical reactions phenolany of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups polyphosphatea salt or ester of polyphosphoric acid polisha preparation used in polishing caustic potash, potash, potassium hydroxidea potassium compound often used in agriculture and industry acrylate, propenoatea salt or ester of propenoic acid pyrimidinea heterocyclic organic compound with a penetrating odor pyrimidineany of several basic compounds derived from pyrimidine pyruvic acida colorless acid formed as an important intermediate in metabolism or fermentation quassiaa bitter compound used as an insecticide and tonic and vermifuge; extracted from the wood and bark of trees of the genera Quassia and Picrasma minium, red leada reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics rubber, synthetic rubberany of various synthetic elastic materials whose properties resemble natural rubber salicylatea salt of salicylic acid (included in several commonly used drugs) double salta solution of two simple salts that forms a single substance on crystallization bile salta salt of bile acid and a base; functions as an emulsifier of lipids and fatty acids Glauber's salt, Glauber's salts(Na2SO4.10H2O) a colorless salt used as a cathartic cream of tartar, potassium bitartrate, potassium hydrogen tartrate, tartara salt used especially in baking powder sodium chloratea colorless salt (NaClO3) used as a weed killer and an antiseptic dichromic acidthe hypothetical acid (H2Cr2O7) from which dichromates are derived; known only in solution and in the form of dichromate salts bichromate, dichromatea salt of the hypothetical dichromic acid sodium bichromate, sodium dichromatea red-orange salt used as a mordant ammonium nitrateused as an explosive and fertilizer and rocket propellant silver nitratea nitrate used in making photographic emulsions; also used in medicine as a cautery and as a topical antibacterial agent caustic soda, sodium hydroxidea strongly alkaline caustic used in manufacturing soap and paper and aluminum and various sodium compounds microcosmic salta white salt present in urine and used to test for metal oxides trichlorideany compound containing three chlorine atoms in each molecule bichloride, dichloridea compound containing two chlorine atoms per molecule perchloridea chloride containing an unusually high proportion of chlorine aluminium chloride, aluminum chloridea chloride used as a wood preservative or catalyst dichloromethane, methylene chloridea nonflammable liquid used as a solvent and paint remover and refrigerant obidoxime chloridea chloride used as an antidote for nerve gases such as sarin or VX silver chloridea chloride used chiefly in the manufacture of photographic emulsions stannic chloridea colorless caustic liquid made by treating tin with chlorine starcha commercial preparation of starch that is used to stiffen textile fabrics in laundering hemin, protohemina reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood silicic acida jellylike substance (hydrated silica) silicatea salt or ester derived from silicic acid silicone, silicone polymerany of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulation silica, silicon dioxide, silicon oxidea white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite smelling saltsa pungent preparation of ammonium carbonate and perfume; sniffed as a stimulant to relieve faintness sal soda, soda, soda ash, sodium carbonate, washing sodaa sodium salt of carbonic acid; used in making soap powders and glass and paper sodium carboxymethyl cellulosea gummy substance that is a sodium salt of carboxymethyl cellulose; used as a thickening or emulsifying agent sodium fluoridea colorless crystalline salt of sodium (NaF) used in fluoridation of water and to prevent tooth decay spicearomatic substances of vegetable origin used as a preservative steroidany of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects nonsteroid, nonsteroidalan organic compound that does no contain a steroid sulfanilic acid, sulphanilic acida crystalline acid made from aniline and used as a dye sulfate, sulphatea salt or ester of sulphuric acid sulfur oxide, sulphur oxideany of several oxides of sulphur superoxidea metallic oxide containing the univalent anion O2- tetroxidean oxide containing four atoms of oxygen in the molecule thiouracildepresses the function of the thyroid gland thiocyanatea salt of thiocyanic acid; formed when alkaline cyanides are fused with sulfur thiocyanic acidan unstable acid that can be obtained by distilling a thiocyanate salt toluic acidan isomeric acid derived from toluene trimera polymer (or a molecule of a polymer) consisting of three identical monomers trioxidean oxide containing three atoms of oxygen in the molecule triphosphoric acidan acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters tungstatea salt of tungstic acid coenzyme Q, ubiquinoneany of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration undecylenic acidan acid that is a component of perspiration uranyl nitratea yellow salt obtained by the reaction of uranium salts with nitric acid carbamide, ureathe chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics uric acida white tasteless odorless crystalline product of protein metabolism; found in the blood and urine uratea salt of uric acid vanadatea salt or ester of vanadic acid; an anion containing pentavalent vanadium oil of vitriol, sulfuric acid, sulphuric acid, vitriol(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry cadmium sulfidea yellow sulfide used chiefly as a pigment flowers of zinc, philosopher's wool, philosophers' wool, zinc oxideoxide of zinc; a white powder used as a pigment or in cosmetics or glass or inks and in zinc ointment zinc sulfide, zinc sulphidea yellow to white crystalline fluorescent compound that occurs naturally as sphalerite or wurtzite and is used as a luminous pigment zirconia, zirconium dioxide, zirconium oxidea white crystalline oxide; used in refractories and in insulation and abrasives and enamels and glazes imideany of a class of organic compounds that contain the divalent radical -CONHCO- xanthatea salt or ester of xanthic acid xanthic acidany of a class of unstable organic acids containing sulphur xanthinecrystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine chemical, chemical substance material produced by or used in a reaction involving changes in atoms or molecules 3adj composed of more than one part compound leaves are composed of several lobes compound flower heads Syn|Ant bilobate, bilobated, bilobed having two lobes binategrowing in two parts or in pairs bipartitedivided into two portions almost to the base bipinnateof a leaf shape; having doubly pinnate leaflets (as ferns) bipinnatifidpinnatifid with the segments also pinnatifid cleft, dissectedhaving one or more incisions reaching nearly to the midrib conjugate(of a pinnate leaflet) having only one pair of leaflets decompoundof a compound leaf; consisting of divisions that are themselves compound abruptly-pinnate, even-pinnate, paripinnate(of a leaf shape) pinnate with a pair of leaflets at the apex incisedsharply and deeply indented lobate, lobedhaving deeply indented margins but with lobes not entirely separate from each other imparipinnate, odd-pinnate(a leaf shape) pinnate with a single leaflet at the apex palm-shaped, palmateof a leaf shape; having leaflets or lobes radiating from a common point palmatifidof a leaf shape; palmately cleft rather than lobed partedhaving a margin incised almost to the base so as to create distinct divisions or lobes pedateof a leaf shape; having radiating lobes, each deeply cleft or divided pinnate, pinnated(of a leaf shape) featherlike; having leaflets on each side of a common axis pinnatifid(of a leaf shape) cleft nearly to the midrib in broad divisions not separated into distinct leaflets pinnatisect(of a leaf shape) cleft nearly to the midrib in narrow divisions not separated into distinct leaflets quinquefoliate(of a leaf shape) having five leaflets radiatehaving rays or ray-like parts as in the flower heads of daisies ternate(of a leaf shape) consisting of three leaflets or sections trifoliate, trifoliated, trifoliolate(of a leaf shape) having three leaflets three-lobed, trilobate, trilobated, trilobed(of a leaf shape) divided into three lobes tripinnate, tripinnated(of a leaf shape) thrice pinnate tripinnatifid(of a leaf shape) bipinnatifid with segments pinnatifid complexcomplicated in structure; consisting of interconnected parts smoothof the margin of a leaf shape; not broken up into teeth roughof the margin of a leaf shape; having the edge cut or fringed or scalloped simple, unsubdivided (botany) of leaf shapes; of leaves having no divisions or subdivisions acerate, acerose, acicular, needle-shapednarrow and long and pointed; as pine leaves acuminate(of a leaf shape) narrowing to a slender point apiculate(of a leaf shape) having a short sharply pointed tip caudate(of a leaf shape) tapering gradually into a long taillike tip cordate, cordiform, heart-shaped(of a leaf) shaped like a heart cuneate, wedge-shaped(of a leaf shape) narrowly triangular, wider at the apex and tapering toward the base deltoidtriangular or suggesting a capital delta, with a point at the apex dolabrate, dolabriformhaving the shape of the head of an ax or cleaver elliptic(of a leaf shape) in the form of an ellipse bladelike, ensiform, sword-shaped, swordlikeshaped like a sword blade hastate, spearhead-shaped(of a leaf shape) like a spear point, with flaring pointed lobes at the base lancelike, lanceolate(of a leaf shape) shaped like a lance head; narrow and tapering to a pointed apex elongate, linear(of a leaf shape) long and narrow lyrate(of a leaf shape) having curvature suggestive of a lyre needledof trees whose leaves are acerate two-needled(of conifers) having two needles three-needled(of conifers) having three needles four-needled(of conifers) having four needles five-needled(of conifers) having five needles obtuse(of a leaf shape) rounded at the apex oblanceolate(of a leaf shape) having a broad rounded apex and a tapering base oblong(of a leaf shape) having a somewhat elongated form with approximately parallel sides obovate(of a leaf shape) egg-shaped with the narrower end at the base orbicular, orbiculatecircular or nearly circular ovateof a leaf shape; egg-shaped with the broader end at the base fiddle-shaped, pandurate, panduriform(of a leaf shape) having rounded ends and a contracted center peltate, shield-shaped(of a leaf shape) round, with the stem attached near the center of the lower surface rather than the margin (as a nasturtium leaf for example) perfoliate(of a leaf) having the base united around (and apparently pierced by) the stem kidney-shaped, reniform(of a leaf or bean shape) resembling the shape of kidney arrow-shaped, sagittate, sagittiform(of a leaf shape) like an arrow head without flaring base lobes spatula-shaped, spatulate(of a leaf shape) having a broad rounded apex and a narrow base unlobedwithout lobes simplehaving few parts; not complex or complicated or involved smoothof the margin of a leaf shape; not broken up into teeth 4adj consisting of two or more substances or ingredients or elements or parts soap is a compound substance housetop is a compound word a blackberry is a compound fruit Syn complex complicated in structure; consisting of interconnected parts 5adj composed of many distinct individuals united to form a whole or colony Syn colonial complex complicated in structure; consisting of interconnected parts 6v combine so as to form a whole; mix compound the ingredients Syn|Hypo|Hyper combine incorporate, integrate make into a whole or make part of a whole heterodynecombine (a radio frequency wave) with a locally generated wave of a different frequency so as to produce a new frequency equal to the sum or the difference between the two sulfurette, sulphurettecombine with sulfur carburetcombine with carbon foldincorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating reintegrateintegrate again build inmake something an integral part of something else re-incorporateincorporate again or anew amalgamate, commix, mingle, mix, unify to bring or combine together or with something else 7v put or add together Syn|Hypo|Hyper combine totalise, totalize make into a total recombineto combine or put together again mixcombine (electronic signals) synthesise, synthesizecombine so as to form a more complex, product add make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of 8v create by mixing or combining 2Hyper assemble, piece, put together, set up, tack, tack together create by putting components or members together n an enclosure of residences and other buildings (especially in the Orient) 3Hyper enclosure a structure consisting of an area that has been enclosed for some purpose v make more intense, stronger, or more marked 4Syn|Hypo|Hyper deepen, heighten, intensify heat up, hot up, screw up make more intense fanmake (an emotion) fiercer enhance, heighten, raiseincrease amplifyincrease the volume of sharpenmake crisp or more crisp and precise heighten, sharpenmake (one's senses) more acute potentiateincrease the effect of or act synergistically with (a drug or a physiological or biochemical phenomenon) subtilise, subtilizemake (senses) more keen increase become bigger or greater in amount v calculate principal and interest Hyper account, calculate keep an account of |
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英语词典包含147318条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。