n. In anatomy and zoology: The outer ear; the pinna of the ear; the auricle; especially, the shell of the ear, the hollowed part within the antihelix, leading into the meatus. See cut under car.n. A shell of bone, or a bone like a shell; a turbinated bone.n. Same as couch, 6.n. [ML., ⟩ OF. conque.] An old dry measure of Gascony and Navarre, about 5 pecks, Winchester measure.n. Same as conch, 10.n. The thin, translucent shell of a bivalve mollusk, sometimes used for window-panes in the East Indies.