adjective Botany.
(of stamens) united into two sets by their filaments.
(of plants) having the stamens so united.

1800–10; di-1 + -adelphous

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World English Dictionary
diadelphous (ˌdaɪəˈdɛlfəs)
1.  (of stamens) having united filaments so that they are arranged in two groups
2.  (of flowers) having diadelphous stamens
[C19: from di-1 + Greek adelphos brother]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
diadelphous   (dī'ə-děl'fəs)  Pronunciation Key 
  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.

The American Heritage® Science Dictionary
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