What is the term for fossilized animal droppings?

The term for fossilized animal droppings is coprolite.

Coprolites are trace fossils rather than body fossils because they record an animal’s behavior—especially its diet—instead of preserving bones or other body parts. Minerals such as calcium phosphate, silica, and calcium carbonate can replace or fill the original material, preserving its shape and contents.

The word comes from the ancient Greek kopros, meaning “dung,” and lithos, meaning “stone.” Mary Anning recognized so-called “bezoar stones” associated with ichthyosaur fossils in the 1820s, and William Buckland named and interpreted them as fossilized feces in 1829.

Coprolites can contain seeds, plant fragments, bones, scales, and even insect remains. They are sometimes confused with gastroliths, which are stones swallowed by animals, or with inorganic objects called pseudocoprolites. Ancient human feces are more precisely called paleofeces, although the terms are often used loosely.