Auricula

Definition:

(n.) A species of Primula, or primrose, called also, from the shape of its leaves, bear's-ear.
(n.) A species of Hirneola (H. auricula), a membranaceous fungus, called also auricula Judae, or Jew's-ear.
(n.) A genus of air-breathing mollusks mostly found near the sea, where the water is brackish
(n.) One of the five arched processes of the shell around the jaws of a sea urchin.

Compare auricula with other words:

auricula vs. auriculate