Tyrannosaurus

Tyrannosaurus (from Ancient Greek (túrannos) 'tyrant', and (saûros) 'lizard') is a genus of large theropod dinosaur. The species Tyrannosaurus rex (rex meaning "king" in Latin), often called T. rex or colloquially T-Rex, is one of the best-represented theropods. It lived throughout what is now western North America, on what was then an island continent known as Laramidia. Tyrannosaurus had a much wider range than other tyrannosaurids.