periosteum noun. [pɛrɪ'ɒstɪǝm] Pl, -stea [-stɪǝ]. L16.
[mod. Latin from Greek periosteon, formed as PERI- + osteon bone.]
Anatomy. The thin layer of connective tissue which envelops the bones (except where they are covered by cartilage), and from the inner part of which the bone substance is produced.

■ periosteal adjective surrounding or occurring around a bone; of or pertaining to the periosteum: M19.

■ ,perios'titis, perioste'itis noun inflammation of the periosteum M19.

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