I-guā'no-dōn, n.

(Synop., § 130), n. [From iguana, q. v., and Gr. ὀδούς, ὀδόντος, a tooth.] (Paleon.) A fossil herbivorous lizard found in the Wealden of England. It is supposed to have been from twenty-five to thirty feet long. From its teeth and bones it is thought to have resembled, in many respects, the iguana; whence the name. Mantell.