psilocybin

英 [,saɪlə(ʊ)'saɪbɪn] 美[,psɪlə'saɪbɪn]

psilocybin (n.): 1958, from Modern Latin psilocybe, name of a Central American species of mushroom, from Greek psilos "bare" (see psilo-) + kybe "head."