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. [
1913 Webster]
" Two kinds were particularly esteemed, the Bezoar orientale of India, and the Bezoar occidentale of Peru."
[1913 Webster]