exostosis

[ ek-so-stoh-sis, -suh- ]

/ ˌɛk sɒˈstoʊ sɪs, -sə- /

noun, plural ex·os·to·ses [ek-so-stoh-seez, -suh-] /ˌɛk sɒˈstoʊ siz, -sə-/. Pathology.

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

Nearby words

exoskeleton, exosmosis, exosphere, exospore, exosporium, exostosis, exostosis cartilaginea, exoteric, exoterica, exothermic, exotic

Origin of exostosis

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

Related forms

ex·os·tosed, adjectiveex·os·tot·ic

[ek-so-stot-ik, -suh-] /ˌɛk sɒˈstɒt ɪk, -sə-/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for exostosis

This affection, popularly termed bone spavin, is an exostosis of the hock joint.
Special Report on Diseases of the Horse|United States Department of Agriculture
(a) Perforation of the exostosis, or enlargement of the small passage existing between multiple exostoses, by means of the burr.
A System of Operative Surgery, Volume IV (of 4)|Various
The preliminary steps of the operation are the same as have been already described for removal of an exostosis (see p. 318).
A System of Operative Surgery, Volume IV (of 4)|Various
From the fact that it projects from the surface of the bone it is often spoken of as an exostosis.
Manual of Surgery|Alexis Thomson and Alexander Miles

A wedge-shaped piece of the exostosis is removed, against which pressure has caused symptoms.
Surgery, with Special Reference to Podiatry|Maximilian Stern

British Dictionary definitions for exostosis

exostosis

/ (ˌɛksɒˈstəʊsɪs) /

noun plural -ses (-siːz)

an abnormal bony outgrowth from the surface of a bone

Word Origin for exostosis

C18: via New Latin from Greek, from ex- 1 + osteon bone

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for exostosis

exostosis

[ ĕk′sŏ-stō′sĭs ]

n. pl. -ses (-sēz)

A projection that is capped by cartilage and arises from a bone that develops from cartilage.hyperostosis poroma