[ trahy-pin-eyt ]
/ traɪˈpɪn eɪt /

adjective Botany.

bipinnate, as a leaf, with the divisions also pinnate.
Often tri·pin·nat·ed.

Origin of tripinnate

First recorded in 1750–60; tri- + pinnate

Related forms

tri·pin·nate·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tripinnate

  • Pinnule, a secondary division of a bipinnate or tripinnate leaf, 66.

  • Fronds eight to eighteen inches long, lanceolate-oblong, tripinnate.

    The Fern Lover's Companion|George Henry Tilton
  • Pinna, a primary division with its leaflets of a bipinnate or tripinnate leaf.

  • When these leaflets are again divided in the same way, the leaf becomes thrice pinnate, or tripinnate, as in many Acacias.

British Dictionary definitions for tripinnate


/ (traɪˈpɪnɪt, -eɪt) /


(of a bipinnate leaf) having the pinnules themselves pinnate

Derived Forms

tripinnately, adverb
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