Definition of "exostosis" in English

noun

1. A benign, bony growth, often covered with cartilage, on the surface of a bone or tooth.

   • 2013, Quinton Gopen, Fundamental Otology: Pediatric & Adult Practice, Jaypee Brothers Medical Publishers, page 381, Part of the issue is the exostoses themselves, which can lead the surgeon directly into normal important structures. The exostosis may grow medially and become in direct contact with the tympanic membrane. The exostosis may also grow medial to the annular insertion of the tympanic membrane, placing the facial nerve at significant risk.