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Stearolic :: Stearin (n.) One of the constituents of animal fats and also of some vegetable fats, as the butter of cacao. It is especially characterized by its solidity, so that when present in considerable quantity it materially increases the hardness, or raises the melting point, of the fat, as in mutton tallow. Chemically, it is a compound of glyceryl with three molecules of stearic acid, and hence is technically called tristearin, or glyceryl tristearate..

Durity :: Durity (n.) Hardness; firmness.

Solidity :: Solidity (n.) The state or quality of being solid; density; consistency, -- opposed to fluidity; compactness; fullness of matter, -- opposed to openness or hollowness; strength; soundness, -- opposed to weakness or instability; the primary quality or affection of matter by which its particles exclude or resist all others; hardness; massiveness..

Boron :: Boron (n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hardness and other properties. It occurs in nature also in boracite, datolite, tourmaline, and some other minerals. Atomic weight 10.9. Symbol B..

Impenitence :: Impenitence (n.) The condition of being impenitent; failure or refusal to repent; hardness of heart.

Crustiness :: Crustiness (n.) The state or quality of having crust or being like crust; hardness.

Sclerometer :: Sclerometer (n.) An instrument for determining with accuracy the degree of hardness of a mineral.

Disthene :: Disthene (n.) Cyanite or kyanite; -- so called in allusion to its unequal hardness in two different directions. See Cyanite.

Stone :: Stone (n.) Fig.: Symbol of hardness and insensibility; torpidness; insensibility; as, a heart of stone..

Iridosmium :: Iridosmium (n.) The native compound of iridium and osmium. It is found in flattened metallic grains of extreme hardness, and is often used for pointing gold pens..

Spinel :: Spinelle (n.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, brown, and black, the red variety being the gem spinel ruby. It consist essentially of alumina and magnesia, but commonly contains iron and sometimes also chromium..

Adamantine :: Adamantine (a.) Like the diamond in hardness or luster.

Grain :: Grain (n.) The composite particles of any substance; that arrangement of the particles of any body which determines its comparative roughness or hardness; texture; as, marble, sugar, sandstone, etc., of fine grain..

Iron :: Iron (n.) Like iron in hardness, strength, impenetrability, power of endurance, insensibility, etc.;.

Temper :: Temper (v. t.) To bring to a proper degree of hardness; as, to temper iron or steel..

Steel :: Steel (n.) Fig.: Anything of extreme hardness; that which is characterized by sternness or rigor.

Sear :: Sear (a.) To burn (the surface of) to dryness and hardness; to cauterize; to expose to a degree of heat such as changes the color or the hardness and texture of the surface; to scorch; to make callous; as, to sear the skin or flesh. Also used figuratively..

Scleroderma :: Scleroderma (n.) A disease of adults, characterized by a diffuse rigidity and hardness of the skin..

Obduration :: Obduration (n.) A hardening of the heart; hardness of heart.

Obduredness :: Obduredness (n.) Hardness.

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