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