D defs.my
Entry 1 sense Webster, 1913

Calcium

/(kăl"sĭ*ŭm)/ · Cal·ci·um · IPA /ˈkælsi.əm/
01 n. An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a mem…
  1. 1.
    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.(Chem.)
Phrases & compounds
Calcium light — an intense light produced by the incandescence of a stick or ball of lime in the flame of a combination of oxygen and hydrogen gases, or of oxygen and coal gas; -- called also Drummond light and lime light.