The first scientific name ever given to a dinosaur fossil? Scrotum humanumLauren Davis10/28/12 1:00pm5EditPromoteGo to permalinkDinosaur names often have a majestic ring to them: King of the Tyrant Lizards, Swift Seizer, Colossal Iguana. The very first scientific dinosaur name was assigned to a one-ton carnivore that likely ran about on two legs like Tyrannosaurus Rex. And what was the first bone of this great beast named after? Balls.