Definition of "gastrolith" []

• A pathological stony mass formed in the stomach; gastric calculus. (noun)
• A small stone found in the stomach of some reptiles, fish, and birds that aids in digestion by helping grind ingested food material. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It took Skinner and Duke nearly half an hour to find a Magpie working the gastrolith trade."