from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hard indigestible mass of material, such as hair, vegetable fibers, or fruits, found in the stomachs or intestines of animals, especially ruminants, and humans. It was formerly considered to be an antidote to poisons and to possess magic properties.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mass, usually of hair or undigested vegetable matter, found in an animal's intestines. A hairball.
- n. An enterolith.
from the GNU version of the Collaborative International Dictionary of English
- n. A calculous concretion found in the intestines of certain ruminant animals (as the wild goat, the gazelle, and the Peruvian llama) formerly regarded as an unfailing antidote for poison, and a certain remedy for eruptive, pestilential, or putrid diseases. Hence: Any antidote or panacea.
from The Century Dictionary and Cyclopedia
- n. A name for certain calculi or concretions found in the stomach or intestines of some animals (especially ruminants), formerly supposed to be efficacious in preventing the fatal effects of poison, and still held in estimation in some eastern countries.
Middle English bezear, stone used as antidote to poison, probably from Old French bezahar, gastric or intestinal mass used as antidote to poison, from Arabic bāzahr, from Persian pādzahr : pād-, protector (from Avestan pātar-; see pā- in Indo-European roots) + zahr, poison (from Middle Persian).(American Heritage® Dictionary of the English Language, Fourth Edition)
From Persian پادزهر (pâdzahr, "to expel poison") (In ancient times, bezoars from animals were ground up and ingested as remedies for various maladies and as antidotes to poisons.) (Wiktionary)