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apatosaurus
noun
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How to pronounce apatosaurus:

Definition of apatosaurus:

apatosaurus (noun):
noun. very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs; largest known land animal.
any of a genus (apatosaurus of the family diplodocidae) of very large, herbivorous, sauropod dinosaurs that lived during the late jurassic period and reached a length of over 65 feet (20 meters) and a height of 12 feet (3.7 meters) and are thought to have attained a weight of up to 30 tons (27 metric tons)

Synonyms for apatosaurus:

brontosaurus

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