1. (noun)auricle, atrial auricle, auricula atrii a small conical pouch projecting from the upper anterior part of each atrium of the heart Synonyms: auricula atrii, pinna, auricle, ear, atrial auricle
2. (noun)auricle, pinna, ear the externally visible cartilaginous structure of the external ear Synonyms: capitulum, atrial auricle, pinna, auricula atrii, ear, pinnule, auricle, spike