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 (synset 114656826)
   is a 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.
   subtypes: calcium ion, factor iv - ion of calcium; a factor in the clotting of blood
   substance meronym:

   • fluor, fluorite, fluorspar - a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine
   • gypsum - a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)
   • burnt lime, calcined lime, calcium oxide, calx, fluxing lime, lime, quicklime, unslaked lime - a white crystalline oxide used in the production of calcium hydroxide
   • limestone - a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
   same as: ca, calcium

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