iguanodon
noun
iguan·odon i-ˈgwä-nə-ˌdän 
: any of a genus (Iguanodon) of very large herbivorous dinosaurs of the Early Cretaceous
Example Sentences
Recent Examples on the Web However, there is evidence that tyrannosaurids, like the T-Rex, suffered from gout and that iguanodons may have had osteoarthritis. 
Katie Hunt, CNN, 13 Feb. 2020 Fostoria was an herbivore that stood on its hind legs and belonged to the same group of dinosaurs as iguanodons. Ashley Strickland, CNN, 4 June 2019
Katie Hunt, CNN, 13 Feb. 2020 Fostoria was an herbivore that stood on its hind legs and belonged to the same group of dinosaurs as iguanodons. Ashley Strickland, CNN, 4 June 2019 Word History
Etymology
New Latin Iguanodont-, Iguanodon, from Spanish iguana + Greek odōn tooth, from odont-, odous — more at tooth
First Known Use
1830, in the meaning defined above