gastrolith

(redirected from Gizzard stone)
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gastrolith

[′ga·strə‚lith]
(vertebrate zoology)
A pebble swallowed by certain animals and retained in the gizzard or stomach, where it serves to grind food.
References in periodicals archive ?
Gastroliths are similar to modern birds' gizzard stones, which help grind vegetation and hard-shelled invertebrates into a more easily digested pulp.
Others include footprints, nests, burrows, boreholes, and gastroliths--the gizzard stones that plant-eating dinosaurs swallowed that helped them grind tough vegetation into a more digestible pulp.