Other forms: stegosaurs
A stegosaur was a dinosaur with hard, bony plates all along its back. You can see a stegosaur skeleton at the American Museum of Natural History.
This large, armored, plant-eating of dinosaur is also known as stegosaurus. Most stegosaurs had tails with sharp spikes that they used to defend themselves from predators, and most of them lived in the Northern Hemisphere, mainly in the area that today makes up North America. The name comes from the Greek stegos, "a roof or covering," which describes stegosaur's protective plates.