internal ear

noun
1.
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 ear1 (def 1).
Examples from the web for internal ear
  • These vibrations move three small bones in the middle ear which set in motion the fluid in the internal ear.
  • Their internal ear can detect sound as well as vibrations in the water, such as the thrashings of sick fish.
British Dictionary definitions for internal ear

internal ear

noun
1.
the part of the ear that consists of the cochlea, vestibule, and semicircular canals Also called inner ear, labyrinth
internal ear in Medicine

internal ear n.
See inner ear.