apatosaurus

Definitions of apatosaurus

1. noun

   huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
   synonyms: Apatosaurus excelsus, apatosaur, brontosaur, brontosaurus, thunder lizard

   type of:

   sauropod, sauropod dinosaur

   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