either of two species of spineless, dome-shaped cactus, Lophophora williamsii or L. diffusa, of Texas and northern Mexico, yielding the hallucinogen peyote
one of the dried, buttonlike tops of a mescal of the genus Lophophora, used as a hallucinogen, esp. by certain Indians of Mexico and the southwestern U.S. during religious ceremonies; peyote
PEYOTE, a cactus (a plant native to arid regions) [n]
white, water-soluble, crystalline powder, C11H17NO3, obtained from mescal buttons, that produces hallucinations