Synonym for callosity ... A circumscribed thickening of the keratin layer of the epidermis as a result of repeated friction or intermittent pressure. ... Synonym: callositas, callus, keratoma, poroma, tyle, tyloma. ... Origin: L. Fr. Callosus, thick-skinned ... (05 Mar 2000) ... 
callositas A circumscribed thickening and hypertrophy of the horny layer of the skin.