Po-lyg'o-nūm, n.

n. [Gr. πολύς, many, and γόνυ, the knee, a knee, knot, or joint on the stalk of a plant; equivalent to Lat. geniculum, Fr. polygonée.] (Bot.) A genus of plants embracing a large number of species, including the various kinds of buckwheat, bistort, knotgrass, &c.