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.