Definition Of pinna

noun

a primary division of a pinnate leaf, especially of a fern.

Each leaf has many pinnae and a leaf axis that is subdivided into a midrib and a petiole.

any of a number of animal structures resembling fins or wings.

They get their name from the Latin words pinna (feather or wing) and pedes (feet).

the external part of the ear in humans and other mammals; the auricle.

Under direct vision the excessive hair follicles of the external ear canal and pinna were targeted by the laser beam.

Example Of pinna

  • Body piercing and multiple ear piercings in the pinna , rather than the earlobe, are catching on.

  • Contact dermatitis, irritant or allergic, can involve the pinna as well as the external auditory canal.

  • 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.


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