bezoar
n.
5Fr b=zoard < Sp bezoar < Ar bazahr < Pers padzahr < pad, protecting (against) + zahr, poison6 a concretion found in the stomach or intestines of some animals, esp. ruminants, and sometimes humans, formerly thought to be an antidote for poisons

Dear WW: as above, note that the hairy ones were not in original mentions.