the inner portion of the ear, involved in hearing and balance, consisting of a bony labyrinth that is composed of a vestibule, semicircular canals, and a cochlea and that encloses a membranous labyrinth.
Compare 1 (def 1).
the part of the ear that consists of the cochlea, vestibule, and semicircular canals Also called inner ear, labyrinth

internal ear n.
See inner ear.


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