A malleable silvery-white metallic element of the alkaline earth group with symbol Ca and atomic number 20; the fifth most abundant element in the earth crust, occurring especially as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in steel.
(Source: CED)
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
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
