雷龍
Brontosaurus \Bron`to*sau"rus\, n. [NL., fr. Gr. ? thunder + ? lizard.] (Paleon.) A genus of American jurassic dinosaurs. A length of sixty feet is believed to have been attained by these reptiles.
brontosaurus n : huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic [syn: {apatosaur}, {apatosaurus}, {brontosaur}, {thunder lizard}, {Apatosaurus excelsus}]