Calcium Definition

kălsē-əm
noun
A soft, silver-white, metallic chemical element, one of the alkaline-earth metals, found in limestone, marble, chalk, etc., always in combination: it is used as a reducing agent and in fertilizer, and is the essential part of bones, shells, and teeth: symbol, Ca; at. no. 20
Webster's New World
The definition of calcium is the fifth most abundant element in the human body.
YourDictionary
Calcium is is the fifth most abundant metal in the Earth’s crust, found in the form of a compound or a salt.
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Calcium carbonate is the salt that makes hard water.
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Calcium serves many functions in the body including the construction of bones and teeth.
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Synonyms:
  • ca
  • atomic number 20
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Other Word Forms of Calcium

Noun

Singular:
calcium
Plural:
calciums

Origin of Calcium

  • A New Latin word derived by Sir Humphry Davy in 1808, from Latin calx ("lime", "limestone") because it occurs in limestone.

    From Wiktionary

  • Latin calx calc- lime calx –ium

    From American Heritage Dictionary of the English Language, 5th Edition

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