noun. A very large herbivorous sauropod dinosaur of the genus Diplodocus of the Jurassic Period, having a long neck and tail and a small head, and hind legs longer than the front legs.

noun. A genus of sauropod dinosaurs, based on remains from the Upper Jurassic of Colorado.

noun. Any of several herbivorous sauropod dinosaurs, of the genus Diplodocus, known as fossils from the late Jurassic in North America.

noun. a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America

"The dinosaur excavated at Chalk Cliff in 1875 became known as diplodocus, and some years later along the border of Colorado and Utah an expedition financed by Andrew Carnegie dug up two beautiful specimens."

dinosaur