Noun apatosaurus excelsus has 1 sense
  1. apatosaur, apatosaurus, brontosaur, brontosaurus, thunder lizard, Apatosaurus excelsus - huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
    --1 is a kind of sauropod, sauropod dinosaur
    --1 is a member of genus Apatosaurus, genus Brontosaurus
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