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1. To reduce to a powder, or to a friable
state, by the action of heat; to expel volatile matter from by
means of heat, as carbonic acid from limestone, and thus
(usually) to produce disintegration; as to, calcine
bones.

2. To oxidize, as a metal by the action
of heat; to reduce to a metallic calx.

Cal*cine", v. i. To be
converted into a powder or friable substance, or into a calx, by
the action of heat. "Calcining without fusion"
Newton.

Cal*cin"er (?), n. One who, or
that which, calcines.

||Cal`ci*spon"gi*æ (?), n.
pl. [NL., fr. L. calx, calcis, lime +
spongia a sponge.] (Zoöl.) An order of
marine sponges, containing calcareous spicules. See
Porifera.

Cal"cite (kăl"sīt), n.
[L. calx, calcis, lime.] (Min.) Calcium
carbonate, or carbonate of lime. It is rhombohedral in its
crystallization, and thus distinguished from aragonite. It
includes common limestone, chalk, and marble.


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