calcium calcitreation • calcivorous · · · Info · Definitions · Synonyms · Characters · · calcium · · Text Latin · · Script 7 · · Length Definitions · · · (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. · · Noun Definition 1 Synonyms · · · ca · · Synonym 1 atomic number 20 · · Synonym 2 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D u latin small letter u U+0075