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.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.