One of the mysteries of the English language finally explained.
A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
- ‘Holes and channels run through it, carrying blood vessels and nerves from the periosteum, the bone's membrane covering, to its inner parts.’
- ‘The resultant cellulitis is preseptal, or anterior to the orbital septum, involving a fibrous layer beginning at the periosteum of the skull and extending to the eyelids.’
- ‘Bone and periosteum are well innervated, and these nerve fibers transmit pain.’
- ‘The surgeon coagulates any superficial bleeding vessels with bipolar electrosurgery and uses a periosteal elevator to separate the periosteum from the bone.’
- ‘The orbital septum, a connective tissue reflection of the periosteum, inserts into the eyelids and separates them from the orbits.’
Late 16th century: modern Latin, from Greek periosteon, from peri- ‘around’ + osteon ‘bone’.
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