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Noun
apatosaur
apatosaurus
brontosaur
brontosaurus
thunder lizard
Apatosaurus excelsus
Definition: huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
Definition: A large, herbivorous, gregarious sauropod dinosaur, of the genus Apatosaurus, from Jurassic North America; it had a long neck and tail.