Bezoar, in natural history and medicine, is a calculous concretion, found in the stomach of animals of the goat kind. It is a morbid substance, possessing neither taste nor smell, and it cannot be considered in any other light than as a weak absorbent. In a more comprehensive sense, bezoar includes all concrete substances formed in the intestines of animals : hence pearls, and the concretions called crab's eyes, belong to the. class of bezoars.

Fossil Bezoar, is a kind of stone formed like the animal bezoar of several coats round some extrane-ous body. It is found in Sicily, in sand and clay-pits.