
1) Dinosaur 2) Dinosaur with spiked thumbs
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https://www.crosswordclues.com/clue/iguanodon

Iguanodon (n {respell|i|GWAH|nə-don}; meaning `iguana-tooth`) is a genus of ornithopod dinosaur that existed roughly halfway between the first of the swift bipedal hypsilophodontids of the mid-Jurassic and the duck-billed dinosaurs of the late Cretaceous. While many species have been classified in the genus Iguanodon, dating from the late Juras.....
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http://en.wikipedia.org/wiki/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.Iguanodon: words in the definit...
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http://thinkexist.com/dictionary/meaning/iguanodon/

large herbivorous dinosaurs found as fossils from the Late Jurassic and Early Cretaceous periods (159 million to 99 million years ago) in a wide area ... [1 related articles]
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http://www.britannica.com/eb/a-z/i/7

(pronounced ig-WAHN-oh-don) Iguanodon was a plant-eating dinosaur with thumb spikes. It was about 33 feet (10 m) long and lived during the early Cretaceous period , roughly 130 million to 110 million years ago. The type species is I. anglicum. Iguanodon was named by Holl in 1829.
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

<paleontology> 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. ... Origin: Iguana + Gr, a tooth. ... Source: Webst...
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http://www.encyclo.co.uk/local/20973
I·gua'no·don noun [
Iguana + Greek ..., ..., a tooth.]
(Paleon.) 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 k...
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http://www.encyclo.co.uk/webster/I/7

Iguanodon was a dinosaur of the Cretaceous period. Iguanodon was about ten metres long and walked on its hind legs and also in all-fours - indicated by the presence of small hooves on three of the fingers. It had short arms furnished with four fingers and a spike-like thumb. The mouth comprised a bony beak and strong, ridged cheek teeth, indicating...
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http://www.probertencyclopaedia.com/browse/BI.HTM

[
n] - massive herbivorous bipedal dinosaur with a long heavy tail
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http://www.webdictionary.co.uk/definition.php?query=iguanodon
noun massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period
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Plant-eating dinosaur whose remains are found in deposits of the Lower Cretaceous age, together with the remains of other dinosaurs of the same order (ornithiscians) such as stegosaurus and triceratops. It was 5–10 m/16–32 ft long and, when standing upright, 4 m/13 ft tall. It walked on its hind legs, using its long tail to ba...
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https://www.encyclo.co.uk/local/21221

a plant-eating dinosaur of the genus Iguanodon that lived in Europe early in the Cretaceous Period and grew to a length of from 15 to 30 ft. (4.5 to 9 m) and walked erect on its hind feet.
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https://www.infoplease.com/dictionary/iguanodon
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