Definition of pinna in English:


Syllabification: pin·na
Pronunciation: /ˈpinə

noun (plural pinnae /ˈpinē/)

  • 1 Anatomy & Zoology The external part of the ear in humans and other mammals; the auricle.
    More 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.
    More 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.
    More 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'.

More definitions of pinna

Definition of pinna in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day maelstrom
Pronunciation: ˈmālˌsträm
a powerful whirlpool in the sea

Shop for an Oxford dictionary

Find the perfect Oxford dictionary for you in our online shop.