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[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
[hahy-per-o-stot-ik] /ˌhaɪ pər ɒˈstɒt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for hyperostosis
Historical Examples
  • 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


noun (pathol) (pl) -ses (-siːz)
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
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hyperostosis in Medicine

hyperostosis hy·per·os·to·sis (hī'pər-ŏ-stō'sĭs)
n. pl. hy·per·os·to·ses (-sēz)

  1. Excessive or abnormal thickening or growth of bone tissue.

  2. See exostosis.

hy'per·os·tot'ic (-ŏ-stŏt'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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