Definition of pinna in English:

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Pronunciation: /ˈpɪnə/

noun (plural pinnae /ˈpɪniː/)

1 Anatomy & Zoology The external part of the ear in humans and other mammals; the auricle.
Example sentences
  • Under direct vision the excessive hair follicles of the external ear canal and pinna were targeted by the laser beam.
  • Patients with otitis externa experience pain on manipulation of the pinna or tragus, and their ear canal is edematous and filled with infectious debris.
  • Body piercing and multiple ear piercings in the pinna, rather than the earlobe, are catching on.
2 Botany A primary division of a pinnate leaf, especially of a fern.
Example sentences
  • Each leaf has many pinnae and a leaf axis that is subdivided into a midrib and a petiole.
  • If the primary pinnae are divided, then the individual divisions are known as pinnules.
  • Lepidoteris fronds typically have so-called intercalary pinnules along the rachis between the primary pinnae, and are covered with the characteristic blisters mentioned above.
3 Zoology Any of a number of animal structures resembling fins or wings.
Example sentences
  • They get their name from the Latin words pinna (feather or wing) and pedes (feet).


Late 18th century: modern Latin, from a variant of Latin penna 'feather, wing, fin'.

For editors and proofreaders

Line breaks: pinna

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