Calcite
one of the commonest minerals, calcium carbonate, CaCO 3 , found in a great variety of crystalline forms: a major constituent of limestone, marble, and chalk; calc-spar.
Historical Examples
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 Various
De Re Metallica Georgius Agricola
The Voyage of the Vega round Asia and Europe, Volume I and Volume II A.E. Nordenskieold
Birds and Nature, Vol. 12 No. 2 [July 1902] Various
Waiting for Daylight Henry Major Tomlinson
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 Various
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 Various
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 Various
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 Various
Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 Various
noun
a colourless or white mineral (occasionally tinged with impurities), found in sedimentary and metamorphic rocks, in veins, in limestone, and in stalagmites and stalactites. It is used in the manufacture of cement, plaster, paint, glass, and fertilizer. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: hexagonal (rhombohedral)
n.
calcite
(kāl’sīt’)
A usually white, clear, pale-yellow or blue orthorhombic mineral. Calcite occurs in many different forms and is the main component of chalk, limestone, and marble. It is a polymorph of aragonite. Chemical formula: CaCO3.
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- Calcitrant
adj.
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a silver-white divalent metal, occurring combined in limestone, chalk, gypsum, etc., occurring also in vertebrates and other animals, as a component of bone, skeletal mass, shell, etc., and as a necessary element in nerve conduction, heartbeat, muscle contraction, and many other physiological functions. Symbol: Ca; atomic weight: 40.08; atomic number: 20; specific gravity: 1.55 at […]
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noun another name for calcium channel blocker