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.
To oxidize, as a metal by the action of heat; to reduce to a metallic calx.
To be convereted into a powder or friable substance, or into a calx, by the action of heat. "Calcining without fusion" Newton.
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