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[per-ee-os-tee-uh m]
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noun, plural per·i·os·te·a [per-ee-os-tee-uh] /ˌpɛr iˈɒs ti ə/. Anatomy.
  1. the normal investment of bone, consisting of a dense, fibrous outer layer, to which muscles attach, and a more delicate, inner layer capable of forming bone.

Origin of periosteum

1590–1600; < New Latin, variant of Late Latin periosteon, noun use of neuter of Greek periósteos around the bones. See peri-, osteo-
Related formsper·i·os·te·al, per·i·os·te·ous, adjectiveper·i·os·te·al·ly, adverbsub·per·i·os·te·al, adjectivesub·per·i·os·te·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for subperiosteally


noun plural -tea (-tɪə)
  1. a thick fibrous two-layered membrane covering the surface of bones
Derived Formsperiosteal, adjective

Word Origin

C16: New Latin, from Greek periosteon, from peri- + osteon 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

Word Origin and History for subperiosteally



1590s, from Modern Latin periosteum, Late Latin periosteon, from Greek periosteon, neuter of periosteos "round the bones," from peri- (see peri-) + osteon (see osseous).

Online Etymology Dictionary, © 2010 Douglas Harper

subperiosteally in Medicine


n. pl. per•i•os•te•a (-tē-ə)
  1. The thick fibrous membrane covering the entire surface of a bone except its articular cartilage and serving as an attachment for muscles and tendons.
Related formsper′i•oste•al (-tē-əl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.