‖prop. n. pl. [ NL., fr. Gr. 'okta- (for 'oktw` eight) + &unr_;, &unr_;, male, man. ] (Bot.) A Linnaean class of plants, in which the flowers have eight stamens not united to one another or to the pistil. [ 1913 Webster ]

{ } a. (Bot.) Of or pertaining to the Octandria; having eight distinct stamens. [ 1913 Webster ]