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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.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Palaeontology) a massive herbivorous long-tailed bipedal dinosaur of the genus Iguanodon, common in Europe and N Africa in Jurassic and Cretaceous times: suborder Ornithopoda (ornithopods)
[C19: New Latin, from iguana + Greek odōn tooth]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪˈgwɑ nəˌdɒn, ɪˈgwæn ə-)

a bipedal, plant-eating dinosaur, of the genus Iguanodon, that inhabited Europe in the early Cretaceous Period.
[< New Latin (1825) < Sp iguan(a) iguana + Greek -odṓn -toothed (see -odont)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.iguanodon - massive herbivorous bipedal dinosaur with a long heavy tailiguanodon - massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period
dinosaur - any of numerous extinct terrestrial reptiles of the Mesozoic era
genus Iguanodon - type genus of the Iguanodontidae
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