Torosaurus (meaning "perforate lizard") was a genus of ceratopsid dinosaur. It had one of the largest skulls of any land animal known, reaching 2.6 meters (8.5 ft) in length. From head to tail, Torosaurus probably measured about 7.6 meters (25 ft) long and weighed an estimated 4 to 6 tonnes (4.4 to 6.6 tons).