n. [ Gr. &unr_;&unr_;&unr_; the mass of roots (of a tree), a stem, race, fr. &unr_;&unr_;&unr_; to make to root, pass., to take root, fr. &unr_;&unr_;&unr_; a root: cf. F. rhizome. ] (Bot.) A rootstock, such as one of an iris. See Rootstock. [ 1913 Webster ]