‖n. pl. [ NL., fr. Gr. te`tra- (see Tetra-) + &unr_; power. ] (Bot.) A Linnaean class of plants having six stamens, four of which are longer than the others. [ 1913 Webster ]

n. (Bot.) A plant of the order Tetradynamia. [ 1913 Webster ]

{ } a. (Bot.) Belonging to the order Tetradynamia; having six stamens, four of which are uniformly longer than the others. [ 1913 Webster ]