柯林斯詞典brontosaurus /?br?nt??s??/ (also brontosaur) 1. N any very large herbivorous quadrupedal dinosaur of the genus Apatosaurus, common in North America during Jurassic times, having a long neck and long tail: suborder Sauropoda (sauropods) 雷龍 返回 brontosaurus劍橋詞典a large dinosaur that ate plants and had four legs , a very long neck and tail and a small head 雷龍（恐龍的一種） 返回 brontosaurus