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Noun: Apatosaurus excelsus
  1. Huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
    - apatosaur, apatosaurus, brontosaur, brontosaurus, thunder lizard

Type of: sauropod, sauropod dinosaur

Part of: genus Apatosaurus, genus Brontosaurus

Encyclopedia: Apatosaurus excelsus