corn [L, cornu, horn] , a horny mass of condensed epithelial cells overlying a bony prominence. Corns result from chronic friction and pressure. The conic shape of the corn compresses the underlying dermis, making it thin and tender. Corns can become soft and macerated by perspiration. Treatment includes relief of the mechanical pressure and surgical paring or chemical peeling of the excess keratin. Also called clavus. Compare callus, def. 1.
