hardness
n. strength, toughness; stiffness; firmness, solidness | ||||
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Hardness Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Hardness
(n.)
The quality or state of being hard, literally or figuratively.
(n.)
The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
(n.)
The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
(n.)
The quality or state of being hard, literally or figuratively.
(n.)
The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
(n.)
The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
| WordNet 2.0 |
hardness
Noun
1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
(antonym) softness
(hypernym) consistency, consistence, body
(hyponym) firmness
(attribute) hard
2. devoid of passion or feeling
(synonym) unfeelingness, callousness, insensibility
(hypernym) insensitivity, insensitiveness
3. the quality of being difficult to do; "he assigned a series of problems of increasing hardness"
(hypernym) difficulty, difficultness
4. excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
(synonym) severity, harshness, rigor, rigour, inclemency, stiffness
(hypernym) sternness, strictness
Noun
1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
(antonym) softness
(hypernym) consistency, consistence, body
(hyponym) firmness
(attribute) hard
2. devoid of passion or feeling
(synonym) unfeelingness, callousness, insensibility
(hypernym) insensitivity, insensitiveness
3. the quality of being difficult to do; "he assigned a series of problems of increasing hardness"
(hypernym) difficulty, difficultness
4. excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
(synonym) severity, harshness, rigor, rigour, inclemency, stiffness
(hypernym) sternness, strictness
| hEnglish - advanced version |
hardness
hardness
\hard"ness\, n. [as. heardness.]
1. the quality or state of being hard, literally or figuratively. the habit of authority also had given his manners some peremptory hardness. w. scott.
2. (min.) the cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
3. (chem.) the peculiar quality exhibited by water which has mineral salts dissolved in it. such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
note: this quality is caused by the presence of calcium carbonate, causing temporary hardness which can be removed by boiling, or by calcium sulphate, causing permanent hardness which can not be so removed, but may be improved by the addition of sodium carbonate.
hardness
n
1. the property of being rigid and resistant to pressure; not easily scratched; measured on mohs scale [ant: softness]
2. devoid of passion or feeling [syn: unfeelingness, callousness, insensibility]
3. the quality of being difficult to do; "he assigned a series of problems of increasing hardness"
4. excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp" [syn: severity, harshness, rigor, rigour, inclemency, stiffness]
similar words(1)
heart hardness
hardness
\hard"ness\, n. [as. heardness.]
1. the quality or state of being hard, literally or figuratively. the habit of authority also had given his manners some peremptory hardness. w. scott.
2. (min.) the cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched;-measured among minerals on a scale of which diamond and talc form the extremes.
3. (chem.) the peculiar quality exhibited by water which has mineral salts dissolved in it. such water forms an insoluble compound with soap, and is hence unfit for washing purposes.
note: this quality is caused by the presence of calcium carbonate, causing temporary hardness which can be removed by boiling, or by calcium sulphate, causing permanent hardness which can not be so removed, but may be improved by the addition of sodium carbonate.
hardness
n
1. the property of being rigid and resistant to pressure; not easily scratched; measured on mohs scale [ant: softness]
2. devoid of passion or feeling [syn: unfeelingness, callousness, insensibility]
3. the quality of being difficult to do; "he assigned a series of problems of increasing hardness"
4. excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp" [syn: severity, harshness, rigor, rigour, inclemency, stiffness]
similar words(1)
heart hardness
| JM Welsh <=> English Dictionary |
Caled
Caled = n. hardness, hardship; a. hard, hardy; severe
Caled = n. hardness, hardship; a. hard, hardy; severe
Calededd
Calededd = n. hardness, obduracy
Caledi
Caledi = n. hardness; hardship
Caledrwydd
Caledrwydd = n. hardness
Caledwch
Caledwch = n. hardness
Hardness Definition from Science & Technology Dictionaries & Glossaries
| Mineralogy Database |
Mineral Hardness
Definition
Hardness is measured by the resistance which a smooth surface offers to abrasion. The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another.
Table showing Moh's relative hardness scale. Moh's original hardness values are highlighted in yellow. The selection of mineral species for hardness standards is based on the common availability of the mineral. An interesting observation is the fact that each Dana class (except for organic class) of mineral is represented by at least one example.
Determinative Mineral Tables
Metallic Minerals by Hardness and Streak
Non Metallic Minerals by Hardness and Streak
Graph showing the distribution of hardness values by Dana mineral classification.
Definition
Hardness is measured by the resistance which a smooth surface offers to abrasion. The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another.
Table showing Moh's relative hardness scale. Moh's original hardness values are highlighted in yellow. The selection of mineral species for hardness standards is based on the common availability of the mineral. An interesting observation is the fact that each Dana class (except for organic class) of mineral is represented by at least one example.
Determinative Mineral Tables
Metallic Minerals by Hardness and Streak
Non Metallic Minerals by Hardness and Streak
Graph showing the distribution of hardness values by Dana mineral classification.
| Oil and Gas Field Glossary |
Hardness
The measure of the material hardness as demonstrated by one of the following tests: Brinnell Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. The Brinnell Hardness (HB) is determined with a ball pressure test using a steel ball having a diameter of 0. 413 inch (10. 5 mm) or 0. - Knoops Hardness: Material hardness readings taken with a microhardness tester using a load of 1. - Microhardness:The hardness measured in a very small area with a specified type of indenter that has a small specified load, relative to the standard hardness tests described above. - Rockwell Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. A Rockwell B Hardness test (HRB) uses a steel ball having a 0. 0625 inch diameter (1. 59 mm) with an initial test force of 22 lbs (98 N) and a test force of 198. - Vickers Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. The Vickers Hardness (HV) test uses a diamond pyramid having a four-sided surface and an apex angle of 136 , conducted in accordance with DIN 50 133.
The measure of the material hardness as demonstrated by one of the following tests: Brinnell Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. The Brinnell Hardness (HB) is determined with a ball pressure test using a steel ball having a diameter of 0. 413 inch (10. 5 mm) or 0. - Knoops Hardness: Material hardness readings taken with a microhardness tester using a load of 1. - Microhardness:The hardness measured in a very small area with a specified type of indenter that has a small specified load, relative to the standard hardness tests described above. - Rockwell Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. A Rockwell B Hardness test (HRB) uses a steel ball having a 0. 0625 inch diameter (1. 59 mm) with an initial test force of 22 lbs (98 N) and a test force of 198. - Vickers Hardness: Material hardness determined as a measurement of the depth of residual penetration of a test piece upon the surface of the material after a specified load is applied. The Vickers Hardness (HV) test uses a diamond pyramid having a four-sided surface and an apex angle of 136 , conducted in accordance with DIN 50 133.
| Dictionary of Automotive Terms |
| Glossary of water terms |
hardness
a water-quality indication of the concentration of alkaline salts in water, mainly calcium and magnesium. If the water you use is "hard" then more soap, detergent or shampoo is necessary to raise a lather.
a water-quality indication of the concentration of alkaline salts in water, mainly calcium and magnesium. If the water you use is "hard" then more soap, detergent or shampoo is necessary to raise a lather.
| Technical English by wpv |
HARDNESS
The scale-forming and lather-inhibiting qualities which water, high in calcium and magnesium ions, possesses.
The scale-forming and lather-inhibiting qualities which water, high in calcium and magnesium ions, possesses.
| Rubber Glossary |
Hardness
Measured in degrees and based on the penetration into the rubber of a definined indentor under a set load. Three scales are commonly used: IRHD (International Rubber Hardness Degrees), Shore A and Shore D for hard materials over 90o Shore A. IRHD is preferred for for most specifications but Shore A is also in widespread use. See ASTM D2240, D1415
Measured in degrees and based on the penetration into the rubber of a definined indentor under a set load. Three scales are commonly used: IRHD (International Rubber Hardness Degrees), Shore A and Shore D for hard materials over 90o Shore A. IRHD is preferred for for most specifications but Shore A is also in widespread use. See ASTM D2240, D1415
| Materials Science and Engineering Glossary of Terms |
hardness
the measure of a material's resistance to deformation by surface indentation or by abrasion.
the measure of a material's resistance to deformation by surface indentation or by abrasion.
Hardness Definition from Government Dictionaries & Glossaries
| Rabintex Ballistic Dictionary |
Hardness
Toughness of a material's surface.
Toughness of a material's surface.
| The Knighthood, Chivalry & Tournaments Arms and Armour Glossary |
Hardness
The quality of metal that describes resistance to denting, scratching, or bending.
The quality of metal that describes resistance to denting, scratching, or bending.
Hardness Definition from Society & Culture Dictionaries & Glossaries
| Environmental Engineering (English ver.) |
hardness
the amount of calcium carbonate dissolved in water.
the amount of calcium carbonate dissolved in water.
Hardness Definition from Arts & Humanities Dictionaries & Glossaries
| English-Latin Online Dictionary |
hardness
rigor
rigor
Hardness Definition from Entertainment & Music Dictionaries & Glossaries
| English to Federation-Standard Golic Vulcan |
Hardness
lerash'es
lerash'es
Hardness Definition from Religion & Spirituality Dictionaries & Glossaries
| Hitchcock's Bible Names Dictionary |
Jokshan
an offense; hardness; a knocking
an offense; hardness; a knocking
Kishi
hardness; his gravity; his offense
Kishion
hardness; soreness
Hardness Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Hardness
Hardness refers to various properties of matter in the solid phase that give it high resistance to various kinds of shape change when force is applied. Hard matter is contrasted with soft matter.
Macroscopic hardness is generally characterized by strong intermolecular bonds. However, the behavior of solid materials under force is complex, resulting in several different scientific definitions of what might be called "hardness" in everyday usage.
In materials science, there are three principal operational definitions of hardness:
- Scratch hardness: Resistance to fracture or plastic (permanent) deformation due to friction from a sharp object
- Indentation hardness: Resistance to plastic (permanent) deformation due to impact from a sharp object
- Rebound hardness: Height of the bounce of an object dropped on the material, related to elasticity.
| See more at Wikipedia.org... |