Iguana :: Iguana (n.) Any species of the genus Iguana, a genus of large American lizards of the family Iguanidae. They are arboreal in their habits, usually green in color, and feed chiefly upon fruits..
Iguanian :: Iguanian (a.) Resembling, or pertaining to, the iguana..
Iguanodon :: Iguanodon (n.) A genus of gigantic herbivorous dinosaurs having a birdlike pelvis and large hind legs with three-toed feet capable of supporting the entire body. Its teeth resemble those of the iguana, whence its name. Several species are known, mostly from the Wealden of England and Europe. See Illustration in Appendix..
Iguanodont :: Iguanodont (a.) Like or pertaining to the genus Iguanodon.
Iguanoid :: Iguanoid (a.) Pertaining to the Iguanidae.