(1) The hallucinatory alkaloid that is the active agent in mescal buttons
(2) A small spineless globe-shaped cactus; source of mescal buttons
WiktionaryText
Noun
peyote
A small, spineless cactus (Lophophora williamsii) found from southwest United States to central Mexico that produces buttonlike tubercles that can be chewed as a narcotic. Also called mescal.