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Definition of “periosteum” - English Dictionary

"periosteum" in British English

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periosteumnoun [C]

uk   /ˌper.ɪˈɒs.ti.əm/  us   /ˌper.iˈɑːs.ti.əm/ (plural periostea ) specialized
a thin layer of tissue surrounding the outer layer of all bones: The periosteum of the skull is called the pericranium.
(Definition of periosteum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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