\Cal*cine"\, v. i. [imp. & p. p. {Calciden}; p. pr. &
vb. n. {Calcining}.] [F. calciner, fr. L. calx, calcis, lime.
See {Calx}.]
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.