Definition of pinna in English:
pinna
nounPlural pinnae ˈpɪnəˈpɪnə
1Anatomy Zoology
The external part of the ear in humans and other mammals; the auricle.
Example sentencesExamples
- The pinnae of the ears are large and can fold back to protect the ears while the aardvark is burrowing.
- 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.
- 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.
2Botany
A primary division of a pinnate leaf, especially of a fern.
Example sentencesExamples
- Lepidoteris fronds typically have so-called intercalary pinnules along the rachis between the primary pinnae, and are covered with the characteristic blisters mentioned above.
- 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.
3Zoology
Any of a number of animal structures resembling fins or wings.
Example sentencesExamples
- They get their name from the Latin words pinna (feather or wing) and pedes (feet).
Origin
Late 18th century: modern Latin, from a variant of Latin penna 'feather, wing, fin'.