Pinna (noun)
The visible part of the ear that resides outside of the head, the auricle; outer ear excluding the ear canal.
Pinna (noun)
A leaflet or primary segment of a pinnate compound leaf.
Pinna (noun)
A feather, wing, fin, or other similar appendage.
Auricle (noun)
The outer ear or pinna.
Auricle (noun)
An ear-shaped appendage of the left or right atrium of the heart.
Auricle (noun)
An atrium, the smaller of the two types of chamber in the heart.
Auricle (noun)
Any appendage in the shape of an earlobe.
Wiktionary