The process of heating a substance to a high temperature until it turns to ash, powder, or a different chemical form.
Present participle of 'calcine,' from Latin 'calcinare' (to burn to lime), rooted in 'calx.' The -ing suffix creates the continuous/progressive form.
Calcining limestone produces quicklime, which is then used to make mortar, concrete, and was even used in medieval warfare as a weapon—heat chemistry has shaped human history in unexpected ways.
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