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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.


exostosis British  
/ ˌɛksɒˈstəʊsɪs /

noun

  1. an abnormal bony outgrowth from the surface of a 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

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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

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

On the other hand, resolution may occur during the stage of periosteal inflammation, or, an exostosis forms which causes no interference with function.

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

Ringbone is the designation of the exostosis which is found on the coronet and in the digital and phalangeal regions.

From Special Report on Diseases of the Horse by Michener, Charles B.

The nearness of the exostosis to the tibiotarsal articulation can be definitely determined by palpation.

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