huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic
This large herbivorous dinosaur, previously known as Brontosaurus, lived during the Jurassic Period. This dinosaur averaged 20 meters (70 feet) in length and weighed as much as 36 metric tons.
n. A massive, plant-eating dinosaur known from 130 to 190 million-year-old Jurassic period fossils, formerly known as Brontosaurus.
Apatosaurus , previously known as Brontosaurus, is a genus of sauropod dinosaurs that lived about 140 million years ago, during the Jurassic Period. They were some of the largest land animals that ever existed, about 4.5 metres (15 feet) tall at the hips, with a length of up to 21 m (70 feet) and a mass up to 35 metric tonnes (40 tons). Their name means 'deceptive lizard', so-named because the chevron bones were like those of Mosasaurus (Greek apatelos or apatelios meaning 'deceptive' and sauros meaning 'lizard').