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Noun: atomic number 20
  1. 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
    - calcium, Ca

Type of: metal, metallic element

Part of: burnt lime, calcined lime, calcium oxide, calx, fluor, fluorite, fluorspar, fluxing lime, gypsum, lime, limestone, quicklime, unslaked lime