Triceratops (from the Greek tri- / τρι- = "three", kéras / κέρας = "horn", and -ōps / -ωψ = "face"; "three-horned face '"), or the tricerátops, is a genus of Ceratopsian ceratopsian dinosaurs, which lived in the late Cretaceous period, approximately 68 and 66 million years ago, in the Maastrichtian, in what is now North America.
Scott Hartman Skeleton Model Reference.