Urolite is a term composed of two Greek words, uro- meaning "urine" and lithos meaning "stone" and was first used to describe the fossil of a nonliquid urinary secretions produced by some groups of reptiles, in relation to coprolites. The first evidence of recorded liquid waste elimination attributed to a dinosaur was presented to the public in 2002, but no scientific paper had reported fossil evidence of liquid waste of tetrapods elimination to assume that dinosaurs urinated.