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.

Example:
Which Paleontologist discovered Iguanodon?

Taxonomy
Iguanodon, dinosaurs, species, teeth, Mantell, I. bernissartensis, fossil, David B, genus, Bernissart, Iguanodon bernissartensis, Owen, specimens, skeletons, bones, Iguanodon teeth, genus Iguanodon, discovery.

Defination from the web:
... Iguanodon (pronounced /ɨˈɡwɑːnədɒn/, meaning "Iguana tooth") is a genus of ornithopod dinosaur that lived roughly halfway between the first of ...