- bipinnate, as a leaf, with the divisions also pinnate.
Origin of tripinnate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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.
- (of a bipinnate leaf) having the pinnules themselves pinnate
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