| Pronunciation: | | 'kalseeum
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| Matching Terms: | | calcium atpase, calcium blocker, calcium carbide, calcium carbimide, calcium carbonate, calcium channel, calcium channel blocker, calcium channel inhibitor, calcium chloride, calcium hydrate, calcium hydride, calcium hydroxide, calcium hypochlorite, calcium ion, calcium lactate, calcium light, calcium metabolism, calcium nitrate, calcium octadecanoate, calcium oxide, calcium phosphate, calcium stearate, calcium sulfate, calcium sulphate, calcium-channel blocker, calcium-cyanamide, calciuria
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 WordNet Dictionary |
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| | Definition: | | [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 |
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| | Synonyms: | | atomic number 20, Ca |
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| | See Also: | | burnt lime, calcined lime, calcium ion, calcium oxide, calx, factor IV, fluor, fluorite, fluorspar, fluxing lime, gypsum, lime, limestone, metal, metallic element, quicklime, unslaked lime |
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| Webster's 1913 Dictionary |
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| | Definition: | | \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}.
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| Medical Dictionary |
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| | Definition: | | A mineral found in teeth, bones, and other body tissues. |
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| Biology Dictionary |
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| | Definition: | | Calcium is a hard, silvery metallic element which has an atomic number of 20 and an atomic weight of 40.078. It is classified as an alkaline earth element and burns with a yellow-red flame. It is highly reactive (pure calcium reacts explosively with water) and is therefore not found in its pure form in nature. Instead, it is typically found in minerals such as gypsum and fluorite, in limestone (as calcium carbonate) and stalactites/stalagmites, and in the bones, teeth and shells of animals. Calcium is essential in the human diet (people normally consume 600 1400 milligrams per day). The body needs it for a variety of functions, such as blood clotting, the transmission of nerve signals, muscle contraction, and proper heart function. Calcium imbalances can cause many health problems, and some chemical imbalances can cause the mineral to build up in nerve cells, poisoning and ultimately killing them. |
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| | Synonyms: | | Ca |
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