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gastrolith

   Also found in: Medical, Wikipedia, Hutchinson 0.07 sec.
gas·tro·lith  (gstr-lth)
n.
1. A pathological stony mass formed in the stomach; gastric calculus.
2. A small stone found in the stomach of some reptiles, fish, and birds that aids in digestion by helping grind ingested food material.


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? Mentioned in ? References in periodicals archive
 
The digestive tracts of both plesiosaurs also contained dozens of gastroliths, stones that paleontologists speculate were used to grind up hard-shelled prey and thereby aid digestion.
Some plesiosaurs went for clams by Science News
New analyses of the gastroliths in ostriches are casting doubt on that theory.
Role of gastroliths in digestion questioned by Science News
Those clues include gastroliths, or stomach stones, that would have ground ingested vegetation to a pulp.
Fossil suggests carnivorous dinosaurs begat vegetarian kin. (Veggie ... by Perkins, S. / Science News
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