ibogaine Syllabification: (i·bo·ga·ine)Pronunciation: /iˈbōgəˌēn/Definition of ibogaine noun a hallucinogenic compound derived from the roots of a West African shrub, sometimes used as a treatment for heroin or cocaine addiction. The shrub is Tabernanthe iboga, family Apocynaceae Origin:from a blend of iboga (local name for the compound) and cocaineibogaine in other Oxford dictionaries Definition of ibogaine in the British & World English dictionary