noun (plural conchae /-kē, -ˌkī/)
& Zoology a body part that resembles a spiral shell, in particular.
the depression in the external ear leading to its central opening. (also nasal concha) any of several thin, scroll-like (turbinate) bones in the sides of the nasal cavity. 2a round or oval hammered metal disk used as decoration on jewelry, belts, harnesses, etc..