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Definition of calcium noun from the Oxford Advanced Learner's Dictionary

calcium

noun
 
/ˈkælsiəm/
 
/ˈkælsiəm/
 [uncountable]
(symbol Ca)
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  1. a chemical element. Calcium is a soft silver-white metal that is found in bones, teeth and chalk.Topics Physics and chemistryb2
    Oxford Collocations DictionaryCalcium is used before these nouns:
    • concentration
    • deficiency
    • deposit
    • …
    See full entry
    Word Originearly 19th cent.: from Latin calx, calc- ‘lime’, probably from Greek khalix ‘pebble, limestone’ + -ium.
See calcium in the Oxford Advanced American DictionarySee calcium in the Oxford Learner's Dictionary of Academic English
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dizzy
adjective
 
 
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