exostosis

noun

ex·​os·​to·​sis ˌek-(ˌ)sä-ˈstō-səs 

plural exostoses ˌek-(ˌ)sä-ˈstō-ˌsēz 

: a spur or bony outgrowth from a bone or the root of a tooth

Examples of exostosis in a Sentence

Recent Examples on the Web

The opinion was unanimous that these were tori, also called exostoses, a benign type of bony overgrowth of the jaw. — Dr. Keith Roach, oregonlive, 26 Jan. 2023

An exostosis forms when the ears’ delicate tissues are repeatedly irritated over long periods of time. — Nathaniel Scharping, Discover Magazine, 14 Aug. 2019

Riley was born with a genetic condition called hereditary multiple exostoses (HME), which causes irregular bone growth. — George Diaz, OrlandoSentinel.com, 4 July 2017

Word History

Etymology

New Latin, from Greek exostōsis, from ex out of + osteon bone — more at ex-, osseous

First Known Use

1736, in the meaning defined above

Rhymes for exostosis

• acanthosis
• acidosis
• alkalosis
• amaurosis
• ankylosis
• asbestosis
• brucellosis
• cyanosis
• dermatosis
• diagnosis
• ecchymosis
• fluorosis

Medical Definition

exostosis

noun

ex·​os·​to·​sis ˌek-(ˌ)säs-ˈtō-səs 

plural exostoses -ˌsēz 

: a spur or bony outgrowth from a bone or the root of a tooth

exostotic

-ˈtät-ik 

adjective