- (of stamens) united into two sets by their filaments.
- (of plants) having the stamens so united.
- (of stamens) having united filaments so that they are arranged in two groups
- (of flowers) having diadelphous stamens
- 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.
- Having stamens so arranged.