[ hahy-per-o-stoh-sis ]
/ ˌhaɪ pər ɒˈstoʊ sɪs /

noun Pathology.

abnormal development of bony tissue.

Origin of hyperostosis

First recorded in 1825–35; hyper- + ostosis

Related forms

hy·per·os·tot·ic [hahy-per-o-stot-ik] /ˌhaɪ pər ɒˈstɒt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hyperostosis

  • When there is hyperostosis and sclerosis, the shaft appears denser and broader than normal, and the contour is uneven or wavy.

    Manual of Surgery|Alexis Thomson and Alexander Miles

British Dictionary definitions for hyperostosis


/ (ˌhaɪpərɒˈstəʊsɪs) /

noun plural -ses (-siːz) pathol

an abnormal enlargement of the outer layer of a bone
a bony growth arising from the root of a tooth or from the surface of a bone

Derived Forms

hyperostotic (ˌhaɪpərɒˈstɒtɪk), adjective
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 hyperostosis


[ hī′pər-ŏ-stōsĭs ]

n. pl. hy•per•os•to•ses (-sēz)

Excessive or abnormal thickening or growth of bone tissue.

Related forms

hy′per•os•totic (-ŏ-stŏtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.