chemical

chem·i·cal

C0270300 (kĕm′ĭ-kəl)adj.1. Of or relating to chemistry.2. Of or relating to the properties or actions of chemicals.3. Of or relating to chemical weapons: chemical warfare.n.1. A substance with a distinct molecular composition that is produced by or used in a chemical process.2. A drug, especially an illicit or addictive one.

[Obsolete chimical, from chimic, alchemist, from New Latin chimicus, from Medieval Latin alchimicus, from alchymia, alchemy; see alchemy.]

chem′i·cal·ly adv.

chemical

(ˈkɛmɪkəl) n (Chemistry) any substance used in or resulting from a reaction involving changes to atoms or molecules, esp one derived artificially for practical useadj1. (Chemistry) of or used in chemistry: chemical balance. 2. (Chemistry) of, made from, or using chemicals: chemical fertilizer. ˈchemically adv

chem•i•cal

(ˈkɛm ɪ kəl)

n. 1. a substance produced by or used in chemistry. 2. chemicals, Slang. narcotic or mind-altering drugs or substances. adj. 3. of, used in, produced by, or concerned with chemistry or chemicals: a chemical formula. 4. used in chemical warfare: chemical weapons. [1570–80] chem′i•cal•ly, adv.

chem·i·cal

(kĕm′ĭ-kəl)Adjective Relating to or produced by means of chemistry: a chemical discovery; a chemical change.Noun A substance obtained by or used in a chemical process; a chemical compound.

chemical

A unit of mass equal to 1⁄16 of the weighted mass of the three naturally occurring neutral oxygen isotopes. 1 amu chemical = (1.660 ± 0.000 05) x 10-27 kg. Formerly called the atomic weight unit.

Thesaurus

Noun	1.	chemical - material produced by or used in a reaction involving changes in atoms or moleculeschemical substanceexplosive - a chemical substance that undergoes a rapid chemical change (with the production of gas) on being heated or struckmaterial, stuff - the tangible substance that goes into the makeup of a physical object; "coal is a hard black material"; "wheat is the stuff they use to make bread"reactant - a chemical substance that is present at the start of a chemical reactionAlar, daminozide - a chemical sprayed on fruit trees to regulate their growth so the entire crop can be harvested at one timecarrier - an inactive substance that is a vehicle for a radioactive tracer of the same substance and that assists in its recovery after some chemical reactionbacteriacide, bactericide - any chemical agent that destroys bacteriacarbon tetrahalide - compounds composed of 1 carbon and 4 halogen moleculescongener - a minor chemical constituent that gives a wine or liquor its distinctive characterchemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weightsoil conditioner - a chemical substance used to improve the structure of the soil and increase its porosity; "gypsum can be used as a soil conditioner"fertiliser, fertilizer, plant food - any substance such as manure or a mixture of nitrates used to make soil more fertileflux - a substance added to molten metals to bond with impurities that can then be readily removedfumigant - a chemical substance used in fumigationherbicide, weed killer, weedkiller - a chemical agent that destroys plants or inhibits their growthintermediate - a substance formed during a chemical process before the desired product is obtainedfraction - a component of a mixture that has been separated by a fractional processlarvicide - a chemical used to kill larval pestspesticide - a chemical used to kill pests (as rodents or insects)phytochemical - a chemical substance obtained from plants that is biologically active but not nutritiveproduct - a chemical substance formed as a result of a chemical reaction; "a product of lime and nitric acid"restrainer - a chemical that is added to a photographic developer in order to retard development and reduce the amount of fog on a filmstabilizer - a chemical that is added to a solution or mixture or suspension to maintain it in a stable or unchanging statesoftener - a substance added to another to make it less hard
Adj.	1.	chemical - relating to or used in chemistry; "chemical engineer"; "chemical balance"chemic
	2.	chemical - of or made from or using substances produced by or used in reactions involving atomic or molecular changes; "chemical fertilizer"

chemical

noun compound, drug, substance, synthetic substance, potion The whole food-chain is affected by the over-use of chemicals in agriculture.

Chemical elements

Symbols	Atomic numbers
hydrogen	H	1
helium	He	2
lithium	Li	3
beryllium	Be	4
boron	B	5
carbon	C	6
nitrogen	N	7
oxygen	O	8
fluorine	F	9
neon	Ne	10
sodium	Na	11
magnesium	Mg	12
aluminium or (U.S.) aluminum	Al	13
silicon	Si	14
phosphorus	P	15
sulphur or (U.S.) sulfur	S	16
chlorine	Cl	17
argon	Ar	18
potassium	K	19
calcium	Ca	20
scandium	Sc	21
titanium	Ti	22
vanadium	V	23
chromium	Cr	24
manganese	Mn	25
iron	Fe	26
cobalt	Co	27
nickel	Ni	28
copper	Cu	29
zinc	Zn	30
gallium	Ga	31
germanium	Ge	32
arsenic	As	33
selenium	Se	34
bromine	Br	35
krypton	Kr	36
rubidium	Rb	37
strontium	Sr	38
yttrium	Y	39
zirconium	Zr	40
niobium	Nb	41
molybdenum	Mo	42
technetium	Tc	43
ruthenium	Ru	44
rhodium	Rh	45
palladium	Pd	46
silver	Ag	47
cadmium	Cd	48
indium	In	49
tin	Sn	50
antimony	Sb	51
tellurium	Te	52
iodine	I	53
xenon	Xe	54
caesium or (U.S.) cesium	Cs	55
barium	Ba	56
lanthanum	La	57
cerium	Ce	58
praseodymium	Pr	59
neodymium	Nd	60
promethium	Pm	61
samarium	Sm	62
europium	Eu	63
gadolinium	Gd	64
terbium	Tb	65
dysprosium	Dy	66
holmium	Ho	67
erbium	Er	68
thulium	Tm	69
ytterbium	Yb	70
lutetium or lutecium	Lu	71
hafnium	Hf	72
tantalum	Ta	73
tungsten or wolfram	W	74
rhenium	Re	75
osmium	Os	76
iridium	Ir	77
platinum	Pt	78
gold	Au	79
mercury	Hg	80
thallium	Tl	81
lead	Pb	82
bismuth	Bi	83
polonium	Po	84
astatine	At	85
radon	Rn	86
francium	Fr	87
radium	Ra	88
actinium	Ac	89
thorium	Th	90
protactinium	Pa	91
uranium	U	92
neptunium	Np	93
plutonium	Pu	94
americium	Am	95
curium	Cm	96
berkelium	Bk	97
californium	Cf	98
einsteinium	Es	99
fermium	Fm	100
mendelevium	Md	101
nobelium	No	102
lawrencium	Lr	103
rutherfordium	Rf	104
dubnium	Db	105
seaborgium	Sg	106
bohrium	Bh	107
hassium	Hs	108
meitnerium	Mt	109

Translations

化学制品化学品化学的

chemistry

(ˈkemistri) noun (the science that deals with) the nature of substances and the ways in which they act on, or combine with, each other. Chemistry was his favourite subject; the chemistry of the blood.化学ˈchemical adjective of chemistry. a chemical reaction.化学的 noun a substance used in or obtained by a chemical process. Some chemicals give off harmful fumes.化学制品ˈchemist noun1. a scientist who studies or works in chemistry. an industrial chemist.化学家2. (American ˈdruggist) a person who makes up and sells medicines and usually also soap, make-up etc. 药剂师3. a chemist's shop. Where is the nearest chemist?药房

chemical

→ 化学品zhCN

chemical

[kem´ĭ-k'l] 1. pertaining to chemistry.2. a substance composed of chemical elements, or obtained by chemical processes.

chem·i·cal

(kem'i-kăl), Relating to chemistry.

Pearl Index

Obstetrics A formula that allows comparison of the efficacy of contraceptive methods, calculated as the pregnancy rate in population divided by 100 yrs of exposure. See Breast feeding, Coitus interruptus, Condoms, Morning-after pill, Contraception, Natural family planning, Norplant, Rhythm method, RU 486. Pearl index–pregnancies/100 years of use Physiologic 15-30/100 years: Coitus interruptus, natural family planning (rhythm or safe period), eg calendar method, evaluation of cervical mucosa or temperature, breast feeding Chemical 15-20/100 years: Contraceptive sponges Barrier 2-20/100 years: Intrauterine devices, condoms Hormonal 1-3/100 years Surgical << 1/100 years: Ligation of fallopian tubes, vas deferens

chem·i·cal

(kem'i-kăl) Relating to chemistry.

Patient discussion about chemical

Q. How do you know when depression is chemical or situational? I've been feeling frustrated lately and while I think I show some signs of depression I think it is more a feeling down because of recent changes in my life.Every time I have seen a professional they all want to start me on some drug and having really seen no improvement over the years I swore off them years ago.When is it depression or "My life sucks right now"?A. Thank you Johanna for sharing this with us.

Q. ADHD medications work on these brain chemicals? Hope you all know about the different types of brain chemicals, so the ADHD medications work on these brain chemicals?A. Yes Alexzander. The active ingredients in the common ADHD medications are amphetamines. The amphetamines artificially increase the amount of certain neurotransmitters in the brain, speeding up the brain (thus the term “speed” for amphetamines). This makes the frontal area more active, at least while the drug is acting.

Q. How do you tell the difference between chemical burns, and burns from fire? Please don't spare on gross words i would like to know everything there is to burns.A. Here is a ton of info on both-
http://en.wikipedia.org/wiki/Chemical_burn
http://en.wikipedia.org/wiki/Burn_%28injury%29

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Chemical elements

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chem·i·cal

Pearl Index

chem·i·cal

Patient discussion about chemical

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Synonyms for chemical

noun compound

Synonyms

Synonyms for chemical

noun material produced by or used in a reaction involving changes in atoms or molecules

Synonyms

Related Words

adj relating to or used in chemistry

Synonyms