Top Definition
A genus of mushrooms, of which many species contain the psychedelic compound psilocybin, including P. cubensis (Cubes), P. semilanceata (Liberty Caps)
Many mushrooms of the genus Psilocybe are hallucinogenic.
by DJ Dre January 06, 2005
The mushroom Psilocybe mexicana, which contains a hallucinogenic compound, C^12 H^17 N^2O4 P
by larstait October 13, 2003

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