Pol"y*po`di*um (?), n. [L., fr. Gr. &?;, dim. of &?;. See Polyp, and cf. 2d Polypode.] (Bot.) A genus of plants of the order Filices or ferns. The fructifications are in uncovered roundish points, called sori, scattered over the inferior surface of the frond or leaf. There are numerous species.