- Diadelphian Di`a*del"phi*an, Diadelphous Di`a*del"phous, a. [Cf. F. diadelphe.] (Bot.) Of or pertaining to the class Diadelphia; having the stamens united into two bodies by their filaments (said of a plant or flower); grouped into two bundles or sets by coalescence of the filaments (said of stamens). [1913 Webster]
The Collaborative International Dictionary of English. 2000.