i·guan·o·don 
(ĭ-gwänə-dŏn′)
(ĭ-gwänə-dŏn′)n.
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.
[New Latin Iguanodōn, genus name : IGUANA + -ODON.]