| Concha 1. (n.) The plain semidome of an apse; sometimes used for the entire apse. 2. (n.) The external ear; esp. the largest and deepest concavity of the external ear, surrounding the entrance to the auditory canal. Thesaurus Entries 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 |