• synonyms


[dahy-uh-del-fuh s]
adjective Botany.
  1. (of stamens) united into two sets by their filaments.
  2. (of plants) having the stamens so united.
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Origin of diadelphous

First recorded in 1800–10; di-1 + -adelphous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for diadelphous

Historical Examples

  • Diadelphous (stamens), united by their filaments in two sets, 99.

    The Elements of Botany

    Asa Gray

  • Diadelphous, dī-a-del′fus, adj. grouped together in two sets—of the stamens of plants.

  • Filaments monadelphous below in a tube which is adherent to the corolla, diadelphous at the summit.

British Dictionary definitions for diadelphous


  1. (of stamens) having united filaments so that they are arranged in two groups
  2. (of flowers) having diadelphous stamens
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Word Origin

C19: from di- 1 + Greek adelphos brother
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

diadelphous in Science


  1. Gathered into two groups or bundles of equal or different number. The stamens of certain flowers, such as those of some members of the bean family, are diadelphous.
  2. Having stamens so arranged.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.