Pinna definition

pĭnə
(botany) A leaflet or primary division of a pinnately compound leaf.
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(anat.) The external ear; auricle.
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(bot.) A primary division of a pinnately compound leaf, esp. of a fern leaf.
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(zool.) A feather, wing, fin, or similar structure.
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(botany) A leaflet or primary division of a pinnately compound leaf.
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(zoology) A feather, wing, fin, or similar appendage.
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A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.
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(anatomy) The visible part of the ear that resides outside of the head, the auricle.
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(botany) A leaflet or primary segment of a pinnate compound leaf.
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(zoology) A feather, wing, fin, or other similar appendage.
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(zoology) A feather, wing, fin, or similar appendage.
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Other Word Forms

Noun

Singular:
pinna
Plural:
pinnae, pinnas

Origin of pinna

  • Latin feather pet- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition