Triceratops Ischium (with stand)Outside Tyrannosaurus rex, Triceratops may arguably be the most popular & recognizable dinosaur that ever lived. Triceratops was a large plant eating ceratopsian, quadrupedal dinosaur. It had a large frill of bone at the back of its skull and three large, forward pointing horns, that the "normally gentle" beast could use, when it needed to either defend itself from large carnivorous predators, or when asserting itself, within its own pack. Triceratops