Exostosis definitions

ĕk'sŏ-stō'sĭs
A bony growth on the surface of a bone or tooth.
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An abnormal bony growth on the surface of a bone or tooth.
noun
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A bony growth on the surface of a bone or tooth.
noun
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A benign bony growth, often covered with cartilage, on the surface of a bone or tooth.
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Origin of exostosis

Greek exostōsis ex- out of exo– osteon bone ost- in Indo-European roots -ōsis -osis