calcium
noun /ˈkælsiəm/
/ˈkælsiəm/
[uncountable] (symbol Ca)
- a chemical element. Calcium is a soft silver-white metal that is found in bones, teeth and chalk.Topics Physics and chemistryb2Oxford Collocations DictionaryCalcium is used before these nouns:
- concentration
- deficiency
- deposit
- …
Word Originearly 19th cent.: from Latin calx, calc- ‘lime’, probably from Greek khalix ‘pebble, limestone’ + -ium.