Calcined

Part of speech: verb

Definitions

1. Subjected to intense heat below melting point to cause chemical change or remove volatile substances
2. Heated strongly to induce decomposition or alter physical structure without liquefying
3. Exposed to high temperatures to drive off impurities or change composition without melting

Etymology: Heating a substance until it crumbles to powder was once a practical goal of alchemists and early medical practitioners, and the English verb preserves that workshop vocabulary. Its root is the Latin "calx," meaning chalk or limestone, and the Late Latin derivative "calcīna" referred to inorganic material containing lime. Medieval Latin then turned this into "calcināre," meaning to burn like lime or to reduce something to a calx, the powdery residue left after strong heat. The word reached English in Late Middle English as "calcinen," borrowed through Old French "calciner." Its original sense was specific: to heat something until it turned to powder, or to change its nature through heating. Over the centuries the meaning broadened into the general sense of drying or roasting a material by heat, which is the sense used today. The past form "calcined" therefore describes a substance that has been transformed by fire rather than simply warmed.

Synonyms: heated, burned