What is the meaning of Pinna?

The visible part of the ear in most therians that resides outside of the head, the auricle; outer ear excluding the ear canal.

A leaflet or primary segment of a pinnate compound leaf.

A feather, wing, fin, or other similar appendage.

genitive singular of pind

spoke (of a wheel, e.g. in a bicycle)

tiller

sound post (dowel inside an instrument of violin family)

point (unit of scoring in a game or competition)

temper, nerve, fuse (in the sense of losing one's temper)

percent

fin

flipper

Alternative form of penna (wing, feather)

a fin

a merlon, cop (the raised part of a parapet or battlement)

a peg, pin, bolt

pen (writing instrument)

feather

pen

fin

Source: wiktionary.org