(n.) The innermost of the ossicles of the ear; the stirrup, or stirrup bone; -- so called from its form.

Eustachian tube anvil auditory apparatus auditory canal auditory meatus auditory nerve auditory ossicles auditory tube auricle basilar membrane bony labyrinth cauliflower ear cochlea conch concha drumhead ear ear lobe eardrum endolymph external ear hammer incus inner ear lobe lobule lug malleus mastoid process middle ear organ of Corti outer ear oval window perilymph pinna round window secondary eardrum semicircular canals shell stirrup tympanic cavity tympanic membrane tympanum vestibule