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.
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