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[bahy-pin-eyt] /baɪˈpɪn eɪt/
adjective, Botany
pinnate, as a leaf, with the divisions also pinnate.
Origin of bipinnate
1785-95; < New Latin bipinnātus. See bi-1, pinnate
Related forms
bipinnately, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bipinnate
  • In bipinnate muscles this lateral pull is counterbalanced.
  • The leaves are alternately arranged along the stem and are bipinnate.
  • The leaves are alternate, bipinnate, and have petioles.
British Dictionary definitions for bipinnate


(of pinnate leaves) having the leaflets themselves divided into smaller leaflets
Derived Forms
bipinnately, 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
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bipinnate in Science

Relating to compound leaves that grow opposite each other on a larger stem; twice-compound or twice-pinnate. Bipinnate leaves have a feathery appearance. The acacia, coffeetree, and silktree have bipinnate leaves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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