noun馃敆ShareA hallucinogenic alkaloid, C12H15N2O路H2PO3, present in several species of Central American mushroom and producing effects similar to LSD. The prodrug of psilocin."Researchers are studying whether psilocybin can help people with depression. "medicinesubstancechemistrybiochemistrymindphysiologyChat with AIVocabulary GamePractice Reading