Triceratops is Greek for three-horn face. This extinct dinosaur is a genus of herbivorous dinosaur that first appeared during the late, Cretaceous period about 68 (Million Years Ago) in what is now United States Of America. It is one of the last known non-avian dinosaur, and became extinct in the Cretaceous extinction event that occurred about 66 million years ago. Bearing a large bony frill and three horns on its massive four-legged body, with similarities with the modern-day Rhinoceros, Triceratops is one of the most recognizable of all the dinosaurs. It shared the landscape with and was preyed upon by the fearsome T-Rex.