Noun: brontosaur 'brón-tu,sor
- Huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
"The brontosaur's long neck allowed it to reach high vegetation";
- apatosaur, apatosaurus, brontosaurus, thunder lizard, Apatosaurus excelsus
Derived forms: brontosaurs
Type of: sauropod, sauropod dinosaur
Part of: genus Apatosaurus, genus Brontosaurus
Encyclopedia: Brontosaur