au·ri·cle 
(ôrĭ-kəl)
(ôrĭ-kəl)n.
1. Anatomy
a. The outer projecting portion of the ear. Also called pinna.
b. See atrium.
2. Biology An earlobe-shaped part, process, or appendage, especially at the base of an organ.
[Middle English, auricle of the heart, from Old French, little ear, from Latin auricula, ear, earlier diminutive of auris, ear; see ous- in the Appendix of Indo-European roots.]
auri·cled (-kəld) adj.