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calcium

Definitions of calcium
  1. noun
    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
    synonyms: Ca, atomic number 20
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    types:
    calcium ion, factor IV
    ion of calcium; a factor in the clotting of blood
    type of:
    metal, metallic element
    any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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