Tyrannosaurus T-Rex Children Pictures Book & Fun Facts About Tyrannosaurus T-Rex As one of the most ferocious villains in every dinosaur movie, the Tyrannosaurus Rex has gained much interest throughout the years. But aside from being a villain in many dinosaur movies, there are much more interesting facts behind the fierce and feared T-rex. Here are some of them: The name 'Tyrannosaurus' comes from the Greek words "turranos" which means "tyrant" and "sauros" which means "lizard." The word 'Rex' however, means "king" in Latin, and was used to signify the T-rex as the king of hunters for its great hunting powers and abilities. and more........