noun, plural periostea [per-ee-os-tee-uh] . Anatomy.
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.

1590–1600; < Neo-Latin, variant of Late Latin periosteon, noun use of neuter of Greek periósteos around the bones. See peri-, osteo-

periosteal, periosteous, adjective
periosteally, adverb
subperiosteal, adjective
subperiosteally, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
periosteum (ˌpɛrɪˈɒstɪəm)
n , pl -tea
a thick fibrous two-layered membrane covering the surface of bones
[C16: New Latin, from Greek periosteon, from peri- + osteon bone]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

periosteum per·i·os·te·um (pěr'ē-ŏs'tē-əm)
n. pl. per·i·os·te·a (-tē-ə)
The thick fibrous membrane covering the entire surface of a bone except its articular cartilage and serving as an attachment for muscles and tendons.

per'i·os'te·al (-tē-əl) or per'i·os'te·ous (-tē-əs) adj.
The American Heritage® Stedman's Medical Dictionary
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Example sentences
Periosteum-The periosteum adheres to the surface of each of the bones in nearly every part, but not to cartilaginous extremities.
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