Definition of pinna
pinnae
play \ˈpi-ˌnē, -ˌnī\ orpinnas
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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Recent Examples of pinna from the Web
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Humans do have weak vestigial muscles attached to the shell of the ear, called the auricle or pinna, as well as evidence of a vestigial nervous system, which could have functioned to orient the ears.
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Origin and Etymology of pinna
New Latin, from Latin, feather, wing — more at pen
Medical Dictionary
Illustration of pinna
Learn More about pinna
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Britannica.com: Encyclopedia article about pinna
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