from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pathological stony mass formed in the stomach; gastric calculus.
- n. A small stone found in the stomach of some reptiles, fish, and birds that aids in digestion by helping grind ingested food material.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. rocks which are or have been held inside the digestive tract of an animal to aid in buoyancy or food processing.
from the GNU version of the Collaborative International Dictionary of English
- n. See Crab's eyes, under crab.
from The Century Dictionary and Cyclopedia
- n. A gastric concretion or calculus; a stony concretion in the stomach; a bezoar; specifically, one of the concretions called crabs' eyes in the stomach of some crustaceans, as the crawfish. See eye, n., 12.
Taken from gastro-, meaning stomach, and -lith, related to stone. (Wiktionary)
It took Skinner and Duke nearly half an hour to find a Magpie working the gastrolith trade.