noun. A large herbivorous ornithiscian dinosaur of the genus Iguanodon of the Cretaceous Period, having a long broad snout with a horny beak, numerous small teeth, and a spike on each thumb.

noun. The typical genus of the fossil family Iguanodontidæ: so called from the resemblance of the teeth to those of Iguana.

noun. [lowercase] A species or a specimen of the genus Iguanodon or family Iguanodontidæ.

noun. 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.

noun. Any of several large dinosaurs, of the genus Iguanodon, of the Jurassic and Cretaceous periods

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

"A long horn projects from the snout, and it is a fac-simile in miniature of the antediluvian monster, the "iguanodon," who was about a hundred feet long and twelve feet thick -- an awkward creature to meet in a narrow road."

dinosaur