Answer: bezoar

AnswerCrossword Clue
BEZOAR... antelope (black buck)
bezoarany of various calculi found chiefly in the gastrointestinal organs and formerly believed to possess magical properties called also bezoar stone
bezoarcalculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison
bezoara gastric mass