auricula

noun4

1. •
   The external part of the ear.
2. •
   An ornamental primrose (Primula auricula)

   • Réné came on quietly, his trowel in one hand, some auricula roots in the other. — 1919
3. •
   A small conical pouch projecting from either atrium of the heart.
4. •
   A pronounced thickening at the corner of a trilete spore, beyond the end of the laesura.