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a combining form meaning “bone,” used in the formation of compound words:
Also, especially before a vowel, oste-.
Origin of osteo-
< Greek, combining form of ostéon Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for osteo-


combining form
indicating bone or bones: osteopathy
Word Origin
from Greek osteon
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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Word Origin and History for osteo-

before vowels oste-, word-forming element meaning "bone, bones," from Greek osteon "bone" (see osseous).

Online Etymology Dictionary, © 2010 Douglas Harper
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osteo- in Medicine

osteo- or oste-
Bone: osteoarthritis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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