auricle

UK: /ˈɔːrɪk^əl/ US: /ˈɔrɪkəl/ ,(ôr′i kəl)

WordReference Random House Learner's Dictionary of American English © 2025

au•ri•cle /ˈɔrɪkəl/   n. [countable]

1. Anatomy the outer ear.
2. Anatomy one of the upper chambers of the heart;
   atrium.

WordReference Random House Unabridged Dictionary of American English © 2025

au•ri•cle  (ôr′i kəl), n. 

1. Anatomy
   • the projecting outer portion of the ear;
     pinna.
   • Also called auricular appendage. an ear-shaped appendage projecting from each atrium of the heart.
   • (loosely) the atrium.
2. Botany, Zoology a part like or likened to an ear.

• Latin auricula the (external) ear, ear lobe. See auri-², -cle¹
• 1645–55

au′ri•cled, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

auricle / ˈɔːrɪk^əl/ noun

1. the upper chamber of the heart; atrium
2. Also called: pinna the external part of the ear
3. Also called: auricula an ear-shaped part or appendage, such as that occurring at the join of the leaf blade and the leaf sheath in some grasses

Etymology: 17th Century: from Latin auricula the external ear, from auris ear

ˈauricled adjective