Definition of pinna
1a
: a projecting body part (such as a feather, wing, or fin)
b
: the largely cartilaginous projecting portion of the external ear — see ear illustration
2
: a leaflet or primary division of a pinnate leaf or frond
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Merriam-Webster unabridged
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Time Traveler for pinna
The first known use of pinna was in 1682
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