an alkaloid, CHNO, extracted from a tropical African shrub (Tabernanthe iboga) of the dogbane family, and acting as an antidepressant or stimulant: may cause hallucinations, paralysis, etc.
See ibogaine in American Heritage Dictionary 4
(ĭ-bōˈgə-ēnˌ, -ĭn)
noun
An alkaloid, C20H26N2O, that acts as a dopamine blocker and mitigates depression and the symptoms of withdrawal from narcotics, cocaine, and heroin.