polyandria (n.)

1751 in botany, in reference to a class of flowers having 20 or more stamens; 1809 of human relationships (implied in polyandrian), from poly- "many" andr-, stem of aner "man, husband" (from PIE root *ner- (2) "man"), which is used in botany to mean "stamen, having stamens," + -ia "condition of." Late Greek polyandria meant "populousness," a polyandrion was "place where many assemble." Related: Polyandric.