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Synonyms

pinna

American  
[pin-uh] / ˈpɪn ə /

noun

plural

pinnae, pinnas

  1. Botany. one of the primary divisions of a pinnate leaf.

  2. Zoology.

    1. a feather, wing, or winglike part.

    2. a fin or flipper.

  3. Anatomy. auricle.

pinna British  
/ ˈpɪnə /

noun

  1. any leaflet of a pinnate compound leaf

  2. zoology a feather, wing, fin, or similarly shaped part

  3. another name for auricle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
pinna Scientific  
/ pĭn′ə /

plural

pinnae

  1. A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.

Other Word Forms

Etymology

Origin of pinna

1660–70; < Latin: feather, wing, fin

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The fiber comes from byssus threads produced by Pinna nobilis, a large Mediterranean clam that uses these threads to attach itself to rocks.

From Science Daily • Feb. 9, 2026

Valieva’s legal team said it is reviewing the CAS decision before deciding whether to appeal to the Swiss supreme court, lawyer Andrea Pinna said in a statement.

From Seattle Times • Jan. 29, 2024

“Other viruses have also been shown to do this,” said Fábio de Rezende Pinna, an otolaryngologist at the University of São Paulo.

From Washington Post • Sep. 29, 2020

“The university budget now is not enough to finish that thing by any means,” says ichthyologist Mario de Pinna, the MZUSP’s current director.

From Nature • Jul. 15, 2019

My friend Pinna introduced me to his father.

From Jewish Children by Berman, Hannah

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.