{ } 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 ]
a. [ Gr. filadelfia brotherly love, from fila`delfos brotherly; fi`los loved, loving, friendly + 'adelfo`s brother. ] Of or pertaining to Ptolemy Philadelphus, or to one of the cities named Philadelphia, esp. the modern city in Pennsylvania. [ 1913 Webster ]