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See more synonyms for pinna on Thesaurus.com
noun, plural pin·nae [pin-ee] /ˈpɪn i/, pin·nas.
  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(def 1a).
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Origin of pinna

1660–70; < Latin: feather, wing, fin
Related formspin·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for pinna

brochure, pamphlet, flier, handout, handbill, plume, fringe, hand, vane, appendage, pinna, stabilizer, flipper, airfoil, circular, tract, shaft, fluff, crest, down

Examples from the Web for pinna

Historical Examples of pinna

  • Pinna bullata, Swainson (Fig. 168), is also a well-known species.

    The Ocean World:

    Louis Figuier

  • Gloves have been made from the byssal fibers of Pinna mixed with silk.

    The Sea-beach at Ebb-tide

    Augusta Foote Arnold

  • They are found in an oyster which is something like the pinna, only less.

  • Pinna, a primary division with its leaflets of a bipinnate or tripinnate leaf.

  • It is covered by the auricular muscles, and by the base of the pinna of the ear.

British Dictionary definitions for pinna


noun plural -nae (-niː) or -nas
  1. any leaflet of a pinnate compound leaf
  2. zoology a feather, wing, fin, or similarly shaped part
  3. another name for auricle (def. 2)
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Word Origin for pinna

C18: via New Latin from Latin: wing, feather, fin
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 in Medicine


n. pl. pin•nae (pĭnē)
  1. auricle
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Related formspinnal adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

pinna in Science


Plural pinnae (pĭnē) pinnas
  1. A leaflet or primary division of a pinnately compound leaf, especially of a fern frond.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.