pinna is a topic covered in the Taber's Medical Dictionary.

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(pin′ă )

pl. pinnae [L. pinna, penna feather, wing]

1. The mostly cartilaginous, projected part of the external ear. It directs sound waves into the external acoustic meatus toward the tympanic membrane.
SYN: SEE: auricle (1)
2. A feather, fin, wing, or similar appendage.
pinnal (pin′ăl ), adj.

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