from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having the filaments of a flower united into two groups: diadelphous stamens.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having its stamens fused together at least partly by the filaments so that they form two separate bundles, or a bundle and a lone separate stamen.

from The Century Dictionary and Cyclopedia

  • In botany, having stamens united in two sets by their filaments, the sets being equal or unequal; grouped together in two sets: as, diadelphous stamens. In papilionaceous flowers, out of ten stamens nine are often united, while one (the posterior one) is free. Also diadelphian.


di-1 + Greek adelphos, brother.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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