labyrinthus osseus


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bon·y lab·y·rinth

[TA]
a series of cavities (for example, cochlea, vestibule, and semicircular canals) contained within the otic capsule of the petrous portion of the temporal bone; the bony labyrinth is filled with perilymph, in which the delicate, endolymph-filled membranous labyrinth is suspended.
See also: otic capsule.