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.
more about calcium
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