Torosaurus - Meaning : bull lizard 

Torosaurus (TOR-oh-SAWR-us) (also meaning "savage lizard") was a very large theropod dinosaur. This bipedal meat-eater was up to 40 feet (12 metres) long and had extremely short arms.

It lived during the late Jurassic period, about 156-145 million years ago in what is Colorado, USA, North America. The type species is T. tanneri. Torosaurus was named by paleontologists Galton and Jensen in 1979.