Definition of "auricula"

(anatomy) The external part of the ear.  examples

(anatomy) A small conical pouch projecting from either atrium of the heart.  examples

(palynology) A pronounced thickening at the corner of a trilete spore, beyond the end of the laesura.

(horticulture, plural: auriculas) An ornamental primrose (Primula auricula)  quotations  examples