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Webster 1913 Edition

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Noun.

[NL., fr. Gr. [GREEK]; [GREEK] out + [GREEK] bone: cf. F [GREEK]

exostose

(Med.)

Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone.

Coxe.

exostosis ‎(plural exostoses)

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