exostosis

American  

[ek-so-stoh-sis, -suh-] / ˌɛk sɒˈstoʊ sɪs, -sə- /

noun

Pathology.

plural

exostoses

1. the abnormal formation of a bony growth on a bone or tooth.

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exostosis British  

/ ˌɛksɒˈstəʊsɪs /

noun

1. an abnormal bony outgrowth from the surface of a bone

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Other Word Forms

• exostosed adjective
• exostotic adjective

Etymology

Origin of exostosis

1730–40; < New Latin < Greek exóstōsis an outgrowth. See ex- ³, ostosis

Example Sentences

Jomon skeletons show a high incidence of what pathologists term auditory exostosis, meaning abnormal bone growth in the ears as often observed in divers today.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

Primary Tumours—Osteoma.—When the tumour projects from the surface of a bone it is called an exostosis.

From Manual of Surgery Volume First: General Surgery. Sixth Edition. by Thomson, Alexis

Before there is evidence of an exostosis, diagnosis of ringbone is not easy, for it is then a problem of detecting the presence of a ligamentous sprain, periostitis, or osteitis.

From Lameness of the Horse Veterinary Practitioners' Series, No. 1 by Lacroix, John Victor

The author lately excised one-half of shaft of metatarsal and the corresponding half of proximal phalanx of great toe for exostosis, with antiseptic precautions.

From A Manual of the Operations of Surgery For the Use of Senior Students, House Surgeons, and Junior Practitioners by Bell, Joseph

This change may consist of induration, exostosis, or even anchylosis.

From Special Report on Diseases of Cattle by United States. Bureau of Animal Industry