In biology, having or producing callosities; marked by hardened or thickened skin or tissue.
From Latin 'callus' (hardened skin) combined with the adjective suffix '-ate'. Medical and biological terminology borrowed heavily from Latin to create precise terms for physical conditions.
Words like 'callate' show how scientists borrowed Latin terms to describe body features—'callus' literally meant a hard bump on your heel, but scientists extended it to any thickened tissue.
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