gastroliths
/ˈɡæstroʊlɪθs/
noun
- Plural of gastrolith; small stones swallowed by animals to help grind food in the stomach.
- Birds that eat seeds often keep gastroliths in their gizzards.
- The polished gastroliths found in the fossil site were smooth from years of use.
- Many herbivorous dinosaurs had gastroliths in their stomachs.