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Webster 1913 Edition

Calcium

Cal′ci-um

(kăl′sĭ-ŭm)
,
Noun.
[NL., from L.
calx
,
calcis
, lime; cf F.
calcium
. See
Calx
.]
(Chem.)
An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca.
☞ Calcium is widely and abundantly disseminated, as in its compounds calcium carbonate or limestone, calcium sulphate or gypsum, calcium fluoride or fluor spar, calcium phosphate or apatite.

Webster 1828 Edition

Calcium

CALCIUM

,
Noun.
The metallic basis of lime.

Definition 2024

Calcium

Calcium

See also: calcium

German

Noun

Calcium n ‎(genitive Calciums, no plural)

  1. calcium

Declension

Coordinate terms

calcium

calcium

See also: Calcium

English

Chemical element
Ca Previous: potassium (K)
Next: scandium (Sc)

Noun

calcium ‎(countable and uncountable, plural calciums) (Symbol: Ca)

  1. A chemical element, atomic number 20, that is an alkaline earth metal and occurs naturally as carbonate in limestone and as silicate in many rocks.
    • 2013 September-October, Katie L. Burke, “In the News”, in American Scientist:
      Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: […] . The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.
  2. (countable) An atom of this element.

Derived terms

Related terms

Translations

References

  1. ↑ Chambers Dictionary of Etymology, Robert K. Barnhart (ed.), Chambers, 1988

See also

Dutch

Chemical element
Ca Previous: kalium (K)
Next: scandium (Sc)

Pronunciation

Noun

calcium n ‎(uncountable)

  1. calcium

French

Pronunciation

  • IPA(key): /kal.sjɔm/

Noun

calcium m ‎(uncountable)

  1. calcium

Related terms

Latin

Pronunciation

Etymology 1

Form of calx.

Noun

calcium

  1. genitive plural of calx

Etymology 2

Derived from calx, calcis ‎(“chalk”) +‎ -ium ‎(chemical element suffix).

Noun

calcium n ‎(genitive calciī); second declension

  1. (New Latin) calcium

Inflection

Second declension.

Case Singular Plural
nominative calcium calcia
genitive calciī calciōrum
dative calciō calciīs
accusative calcium calcia
ablative calciō calciīs
vocative calcium calcia

Pronunciation

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