| tyloma | 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) |
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| tyloma conjunctivae | Localised keratinization of the conjunctiva, occurring in xerosis of the conjunctiva. (05 Mar 2000) |