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more about calcium
calcium |
4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Calcium \Cal"ci*um\ (k[a^]l"s[i^]*[u^]m), n. [NL., from L. calx, calcis, lime; cf F. calcium. See {Calx}.] (Chem.) An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca Note: Calcium is widely and abundantly disseminated, as in its compounds calcium carbonate or limestone, calcium sulphate or gypsum, calcium fluoride or fluor spar, calcium phosphate or apatite. {Calcium light}, an intense light produced by the incandescence of a stick or ball of lime in the flame of a combination of oxygen and hydrogen gases, or of oxygen and coal gas; -- called also {Drummond light}. From WordNet r 1.6 [wn]: calcium n : a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals [syn: {Ca}, {atomic number 20}] From U.S. Gazetteer (1990) [gazetteer]: Calcium, NY (CDP, FIPS 11671) Location: 44.03470 N, 75.84798 W Population (1990): 2465 (894 housing units) Area: 14.5 sq km (land), 0.0 sq km (water) Zip code(s): 13616 From Elements database 20001107 [elements]: calcium Symbol: Ca Atomic number: 20 Atomic weight: 40.08 Soft grey metallic element belonging to group 2 of the periodic table. Used a reducing agent in the extraction of thorium, zirconium and uranium. Essential element for living organisms.
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