The N′,N′ -dimethyl derivative of 4-hydroxytryptamine; obtained from the fruiting bodies of the fungus Psilocybe mexicana and other species of Psilocybe and Stropharia. P. is a congener of 5-hydroxytryptamine, with striking central nervous system effects, and is readily hydrolyzed to 4-hydroxybufotenine; used as a hallucinogenic agent (and by Mexican aborigines to induce trances). SYN: indocybin.
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psi·lo·cy·bin .sī-lə-'sī-bən n a hallucinogenic indole C12H17N2O4P obtained from a basidiomycetous fungus (as Psilocybe mexicana or P. cubensis syn. Stropharia cubensis)
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psi·lo·cy·bin (si″lo-siґbin) a hallucinogenic crystalline compound with indole characteristics, isolated from mushrooms of the genus Psilocybe, especially P. mexicana Heim.Medical dictionary. 2011.