Research topic:hardness

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hard

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

hard / härd/ • adj. 1. solid, firm, and resistant to pressure; not easily broken, bent, or pierced: a hard mattress ground frozen hard as a rock. ∎  (of a person) not showing any signs of weakness; tough: the hard, tough, honest cop. ∎  (of information) reliable, esp. because based on something true or substantiated: hard facts about the underclass are maddeningly elusive. ∎  (of a subject of study) dealing with precise and verifiable facts: efforts to turn psychology into hard science. ∎  (of water) containing mineral salts that make lathering difficult. ∎  (of prices of stock, commodities, etc.) stable or firm in value. ∎  (of science fiction) scientifically accurate rather than purely fantastic or whimsical: a hard SF novel. ∎  (of a consonant) pronounced as c in cat or g in go. 2. requiring a great deal of endurance or physical or mental effort: stooping over all day was hard work | she found it hard to believe that he could be involved. ∎  putting a lot of energy into an activity: he'd been a hard worker all his life. ∎  difficult to bear; causing suffering: times were hard at the end of the war he'd had a hard life. ∎  not showing sympathy or affection; strict: he can be such a hard taskmaster. ∎  (of a season or the weather) severe: it's been a long, hard winter. ∎  harsh or unpleasant to the senses: the hard light of morning. ∎  (of wine) harsh or sharp to the taste, esp. because of tannin. 3. done with a great deal of force or strength: a hard blow to the head. 4. potent, powerful, or intense, in particular: ∎  (of liquor) strongly alcoholic; denoting distilled spirits rather than beer or wine. ∎ (of apple cider) having alcoholic content from fermentation. ∎  (of a drug) potent and addictive. ∎  denoting an extreme or dogmatic faction within a political party: the hard left. ∎  (of radiation) highly penetrating. ∎  (of pornography) highly obscene and explicit. • adv. 1. with a great deal of effort: they work hard at school. ∎  with a great deal of force; violently: it was raining hard. 2. so as to be solid or firm: the mortar has set hard. 3. to the fullest extent possible: put the wheel hard over to starboard. PHRASES: be hard on 1. treat or criticize (someone) severely: you're being too hard on her. 2. be difficult for or unfair to: I think the war must have been hard on her. 3. be likely to hurt or damage: the monitor flickers, which is hard on the eyes. be hard put find it very difficult: you'll be hard put to find a better compromise. give someone a hard time inf. deliberately make a situation difficult for someone. go hard with dated turn out to (someone's) disadvantage: it would go hard with the poor. hard and fast (of a rule or a distinction made) fixed and definitive: it is impossible to lay down any hard and fast rules. hard as nailssee nail. hard at it inf. busily working or occupied: they were hard at it with brooms and mops. hard by close to: he lived hard by the cathedral. hard feelings feelings of resentment: there are no hard feelings, and we wish him well. hard going difficult to understand or enjoy: the studying is at times hard going. hard hit badly affected: hard hit by falling oil prices. a hard nut to crack inf. a person or thing that is difficult to understand or influence. hard of hearing not able to hear well. hard on (or upon) close to; following soon after: we followed hard on their tracks. hard up inf. short of money: I'm too hard up to buy fancy clothes. the hard way through suffering or learning from the unpleasant consequences of mistakes: his reputation was earned the hard way. play hard to get inf. deliberately adopt an aloof or uninterested attitude, typically in order to make oneself more attractive or interesting.DERIVATIVES: hard·ish adj. hard·ness n.

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Hardness.(Coatings Clinic)
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Hardness measurement of bulk wheat by single-kernel visible and near-infrared reflectance spectroscopy
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Making Hardness Tests a Moving Experience.(Brief Article)
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Related entries from encyclopedias, dictionaries, and thesauruses

hardness
Book article from: The Columbia Encyclopedia, Sixth Edition hardness property of matter commonly described...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...
Mohs' scale of mineral hardness
Book article from: The Oxford Companion to the Earth Mohs' scale of mineral hardness The hardness of a mineral is mainly controlled by the strength of the bonding...Austrian mineralogist Friedrich Mohs proposed a scale of relative hardness based on fairly common minerals (Mohs' scale). The 10...
Vickers hardness number
Book article from: A Dictionary of Earth Sciences Vickers hardness number (VHN) A quantitative measure of the hardness of ore minerals , that is used in their identification. A diamond is...sectional area of the indentation is converted into a number, the Vickers hardness number.
Mohs' scale of hardness
Book article from: World Encyclopedia Mohs' scale of hardness The scale is not regular. Diamond, the hardest known natural substance, is 90 times harder than corundum. Mineral Hardness Simple hardness test Talc 1.0 Crushed by fingernail Gypsum 2.0 Scratched...
Mohs's scale of hardness
Book article from: A Dictionary of Earth Sciences Mohs's scale of hardness Scale, devised in 1812 by the German...mineralogist Friedrich Mohs , of the scratch hardness of minerals , as: 1 talc ; 2 gypsum...diamond . The scale is linear up to a hardness of 9 (corundum), but then rises...

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