The Collaborative International Dictionary of English v.0.48:
Coprolite \Cop"ro*lite\, n. [Gr. ko`pros dung + -lite.] (Paleon.) A piece of petrified dung; a fossil excrement. [1913 Webster]WordNet (r) 3.0 (2006):
coprolite n 1: fossil excrement; petrified dung