\Pol`y*ga"mi*a\, n. pl. [NL. See {Polygamous}.] (Bot.)
(a) A Linn[ae]an class of plants, characterized by having
    both hermaphrodite and unisexual flowers on the same
    plant.
(b) A name given by Linn[ae]us to file orders of plants
    having syngenesious flowers.