‖n. pl. [ NL., from Gr. mo`nos alone + 'adelfo`s brother. ] (Bot.) A Linnaean class of plants having the stamens united into a tube, or ring, by the filaments, as in the Mallow family. [ 1913 Webster ]

{ } a. [ Cf. F. monadelphie. ] (Bot.) Of or pertaining to the Monadelphia; having the stamens united in one body by the filaments. [ 1913 Webster ]