1. (n.) The outermost of the three small auditory bones, ossicles; the hammer. It is attached to the tympanic membrane by a long process, the handle or manubrium.

2. (n.) One of the hard lateral pieces of the mastax of Rotifera. See Mastax.

3. (n.) A genus of bivalve shells; the hammer shell.

Eustachian tube alembic auditory apparatus auditory canal auditory meatus auditory nerve auditory ossicles auditory tube auricle basilar membrane bony labyrinth caldron cauliflower ear cochlea conch concha crucible drumhead ear ear lobe eardrum endolymph engine external ear hammer incus inner ear lathe lobe lobule lug machine malleus mastoid process melting pot middle ear mortar motor organ of Corti outer ear oval window perilymph pinna retort round window secondary eardrum semicircular canals shell stapes stirrup test tube transducer transformer tympanic cavity tympanic membrane tympanum vestibule