auricle(redirected from ala auris)
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a. the upper chamber of the heart; atrium
b. a small sac in the atrium of the heart
2. Anatomy the external part of the ear
3. Biology an ear-shaped part or appendage, such as that occurring at the join of the leaf blade and the leaf sheath in some grasses
An ear-shaped appendage to an atrium of the heart.
Any ear-shaped structure.