stegosaurus (n.)

type of plant-eating dinosaur, 1892, from Modern Latin order name Stegosauria (O.C. Marsh, 1877), from Greek stegos "a roof" (related to stege "covering," stegein "to cover," from PIE root *(s)teg- "to cover" + -saurus. The back-armor plates in the fossilized remains look like roof tiles.