| Noun | 1. | cocain - a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictivecoca - dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their simulating effect tornado, crack - a purified and potent form of cocaine that is smoked rather than snorted hard drug - a narcotic that is considered relatively strong | |