Auricular appendage can refer to:

Here is an item from Iowa's Davenport Daily Leader in 1894: "John Rademaker has an elastic and sympathetic auricular appendage" - that's an ear - "that is always wide open to the reputable men in the profession who get stuck on the slippery slope."

Attached to the right atrium is the right auricular appendix.

The left atrial appendage (LAA) (left auricular appendix, auricula, left auricle) is a muscular pouch connected to the left atrium of the heart.