iguan·​odon i-ˈgwä-nə-ˌdän How to pronounce iguanodon (audio)
: any of a genus (Iguanodon) of very large herbivorous dinosaurs of the Early Cretaceous

Examples of iguanodon in a Sentence

Recent Examples on the Web Top image: Pictured is the iguanodon fossil to be auctioned soon. Kristen Rogers, CNN, 12 Sep. 2022 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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'iguanodon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Time Traveler
The first known use of iguanodon was in 1830

Dictionary Entries Near iguanodon

Cite this Entry

“Iguanodon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/iguanodon. Accessed 16 Apr. 2024.

Kids Definition


iguan·​odon i-ˈgwän-ə-ˌdän How to pronounce iguanodon (audio)
: a large plant-eating dinosaur of the Cretaceous period that usually walked on all four legs

from Spanish iguana "iguana" and Greek odōn "tooth"

More from Merriam-Webster on iguanodon

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