hardness

hard·ness

H0061000 (härd′nĭs)n.1. The quality or condition of being hard.2. The relative resistance of a mineral to scratching, as measured by the Mohs scale.3. The relative resistance of a metal or other material to denting, scratching, or bending.

hardness

(ˈhɑːdnɪs) n1. the quality or condition of being hard2. (Minerals) one of several measures of resistance to indentation, deformation, or abrasion. See Mohs scale, Brinell hardness number3. (Chemistry) the quality of water that causes it to impair the lathering of soap: caused by the presence of certain calcium salts. Temporary hardness can be removed by boiling whereas permanent hardness cannot

hard•ness

(ˈhɑrd nɪs)

n. 1. the state or quality of being hard. 2. that quality in water that is imparted by the presence of dissolved salts, esp. calcium sulfate or bicarbonate. 3. the comparative ability of a substance to scratch or be scratched by another. 4. the measured resistance of a metal to indention, abrasion, deformation, or machining. [before 900]

hard·ness

(härd′nĭs) A measure of how easily a mineral can be scratched. Hardness is measured on the Mohs scale.

Thesaurus

Noun	1.	hardness - the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scaleconsistency, eubstance, consistence, body - the property of holding together and retaining its shape; "wool has more body than rayon"; "when the dough has enough consistency it is ready to bake"firmness - the property of being unyielding to the touchincompressibility - the property of being incompressiblesoftness - the property of giving little resistance to pressure and being easily cut or molded
	2.	hardness - a quality of water that contains dissolved mineral salts that prevent soap from lathering; "the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present"quality - an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
	3.	hardness - devoid of passion or feeling; hardheartednesscallousness, unfeelingness, callosity, insensibilityinsensitiveness, insensitivity - the inability to respond to affective changes in your interpersonal environmentdullness - lack of sensibility; "there was a dullness in his heart"; "without him the dullness of her life crept into her work no matter how she tried to compartmentalize it."
	4.	hardness - the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail"ruggednessdifficultness, difficulty - the quality of being difficult; "they agreed about the difficulty of the climb"
	5.	hardness - excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"inclemency, rigorousness, rigourousness, rigour, rigor, severeness, severity, harshness, stiffnesssternness, strictness - uncompromising resolution

hardness

noun1. firmness, toughness, rigidity, stiffness, solidity, inflexibility, denseness There was an athletic hardness about his body.2. severity, toughness, callousness, strictness, lack of compassion, sternness, cold-heartedness, hard-heartedness Her hardness is balanced by a goofy humor.

hardness

noun1. Reliability in withstanding pressure, force, or stress:fastness, firmness, security, soundness, stability, stableness, steadiness, strength, sturdiness, sureness.2. The fact or condition of being rigorous and unsparing:austerity, harshness, rigidity, rigor, rigorousness, severity, sternness, strictness, stringency, toughness.

Translations

硬度

hard

(haːd) adjective1. firm; solid; not easy to break, scratch etc. The ground is too hard to dig.硬的2. not easy to do, learn, solve etc. Is English a hard language to learn?; He is a hard man to please.困难的3. not feeling or showing kindness. a hard master.冷酷的4. (of weather) severe. a hard winter.恶劣的5. having or causing suffering. a hard life; hard times.艰难的6. (of water) containing many chemical salts and so not easily forming bubbles when soap is added. The water is hard in this part of the country. 硬水 adverb1. with great effort. He works very hard; Think hard.努力地2. with great force; heavily. Don't hit him too hard; It was raining hard. 猛烈的，重重地 3. with great attention. He stared hard at the man. 极专注地，紧紧地 4. to the full extent; completely. The car turned hard right.完全地ˈharden verb to make or become hard. Don't touch the toffee till it hardens; Try not to harden your heart against him.使变硬ˈhardness noun硬度ˈhardship noun (something which causes) pain, suffering etc. a life full of hardship.苦难ˈhard-and-fast adjective (of rules) that can never be changed or ignored. 不容变通的ˈhard-back noun a book with a hard cover. Hard-backs are more expensive than paperbacks. 硬书皮的书，精装书 ˌhard-ˈboiled adjective (of eggs) boiled until the white and the yolk are solid. （鸡蛋）煮得老的 hardˈdisk noun a device that is fixed inside a computer and is used for storing information. 硬盘ˈhard-earned adjective earned by hard work or with difficulty. I deserve every penny of my hard-earned wages.辛苦挣得的ˌhard-ˈheaded adjective practical; shrewd; not influenced by emotion. a hard-headed businessman. 讲实际的，头脑冷静的 ˌhard-ˈhearted adjective not feeling or showing pity or kindness. a hard-hearted employer.冷酷的ˈhardware noun1. metal goods such as pots, tools etc. This shop sells hardware.金属器具2. the mechanical parts of a computer. （电脑的）硬件 ˌhard-ˈwearing adjective that will not wear out easily. a hard-wearing fabric.耐磨损的be hard on1. to punish or criticize severely. Don't be too hard on the boy – he's too young to know that he was doing wrong.过分严厉地对待某人2. to be unfair to. If you punish all the children for the broken window it's a bit hard on those who had nothing to do with it.不公平地对待hard at it busy doing (something). I've been hard at it all day, trying to get this report finished. 忙于作（某事） hard done by unfairly treated. You should complain to the headmaster if you feel hard done by.受到不公平对待hard lines/luck bad luck. Hard lines/luck! I'm afraid you haven't won this time; It's hard luck that he broke his leg.坏运气hard of hearing rather deaf. He is a bit hard of hearing now. 听觉不灵的，有点耳聋的 a hard time (of it) trouble, difficulty, worry etc. The audience gave the speaker a hard time of it at the meeting; The speaker had a hard time (of it) trying to make himself heard. 受苦，困难 hard up not having much especially money. I'm a bit hard up at the moment; I'm hard up for envelopes. （钱）不多，缺钱

hardness

hardness,

property of matter commonly described as the resistance of a substance to being scratched by another substance. The degree of hardness is relative, different substances being compared with one another. Mohs's scale of hardness (named for Friedrich Mohs), used commonly in mineralogy, lists certain minerals in order of hardness: talc, 1; gypsum, 2; calcite, 3; fluorite, 4; apatite, 5; orthoclase, 6; quartz, 7; topaz, 8; corundum, 9; diamond, 10. The listing indicates merely that gypsum (hardness=2) is harder than—i.e., capable of scratching—talc (hardness=1). The listing does not indicate that gypsum (2) is twice as hard as talc (1). The hardness of many minerals falls between those included in the list. For example, the hardness of barite is 3.3. Hardness may differ with the direction of the scratch made on the substance. Thus the mineral kyanite has a hardness of 5 parallel to the length of its crystals and of 7 at right angles to this direction. There are several other methods based on the resistance to indentation for testing engineering materials. The solid elements have been thus classified: diamond (an allotropic form of carbon) is hardest and listed as 10, with cesium the softest, rated as 0.2, the same degree of hardness as wax (hardness=0.2 at 0&degC;). The hardness numeral of the Brinell scale is based upon the indentation produced when pressure is exerted by a sphere on the substance. The value thus obtained has a direct relation to the tensile strength of the substance. The hardness of a material may be modified by the presence of small quantities of another substance, as in metallic alloys, or by impurities in minerals.

hardness

[′härd·nəs] (chemistry) The amount of calcium carbonate dissolved in water, usually expressed as parts of calcium carbonate per million parts of water. (electromagnetism) That quality which determines the penetrating ability of x-rays; the shorter the wavelength, the harder and more penetrating the rays. (engineering) Property of an installation, facility, transmission link, or equipment that will prevent an unacceptable level of damage. (materials) Resistance of a metal or other material to indentation, scratching, abrasion, or cutting.

hardness

1. The resistance of wood, rubber, sealant, plastic, or metal to plastic deformation by compression or indentation; in wood, hardness is generally related to density. Common methods of measurement include the Rockwell, Brinell, Scleroscope, and Vickers tests. 2. A property of a paint or varnish film that is a measure of its ability to withstand damage from marring, abrasion, etc. 3. The degree of hardness, applied to water, based on the amount of calcium and magnesium salts in the water, expressed as grains per gallon or parts per million of calcium carbonate. 4.See Mohs’ scale.

hardness

hard·ness

hardness

hard•ness

hard·ness

hardness

hardness

hard

hardness

hardness,

hardness

hardness

hardness

Synonyms for hardness

noun firmness

Synonyms

noun severity

Synonyms

Synonyms for hardness

noun reliability in withstanding pressure, force, or stress

Synonyms

noun the fact or condition of being rigorous and unsparing

Synonyms

Synonyms for hardness

noun the property of being rigid and resistant to pressure

Related Words

Antonyms

noun a quality of water that contains dissolved mineral salts that prevent soap from lathering

Related Words

noun devoid of passion or feeling

Synonyms

Related Words

noun the quality of being difficult to do

Synonyms

Related Words

noun excessive sternness

Synonyms

Related Words