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.

ornithopod dinosaur of medium to large size, existing from the late Jurassic through the end of the Cretaceous

massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period

(pronounced ig-WAHN-oh-don) Iguanodon was a plant-eating dinosaur with thumb spikes. It was about 33 feet (10 m) long and lived during the early Cretaceous period, roughly 130 million to 110 million years ago. The type species is I. anglicum. Iguanodon was named by Holl in 1829.

"iguana toothed." A european ornithopod who lived in the Jurassic Period. ( more)

Iguanodon (meaning "Iguana tooth") is the name given to a genus of ornithopod dinosaur, which lived roughly halfway between the early hypsilophodontids and their ultimate culmination in the duck-billed dinosaurs. Most of its species lived between 140 to 120 million years ago, in the Valanginian to Barremian ages of the Early Cretaceous Period, although one dubious species is from the Late Jurassic. Iguanodon's most distinctive feature was a large 'thumb spike', possibly used for defense against predators.