psilocybin definition, psilocybin meaning | English dictionary

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      n   a crystalline phosphate ester that is the active principle of the hallucinogenic fungus Psilocybe mexicana. Formula: C12H17N2O4P  
     (C20: from New Latin Psilocybe (from Greek psilos bare + kube head) + -in)  
English Collins Dictionary - English Definition & Thesaurus  
See also:

phycobilin, psi, policy, picoline

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