Often tri·pin·nat·ed.

Origin of tripinnate

First recorded in 1750–60; tri- + pinnate
Related formstri·pin·nate·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tripinnate

Historical Examples of tripinnate

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

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

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

    The Fern Lover's Companion

    George Henry Tilton

  • 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


  1. (of a bipinnate leaf) having the pinnules themselves pinnate
Derived Formstripinnately, 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