PHENOBARBITONE Meaning of PHENOBARBITONE in English [ ˌfi:nə(ʊ)'bα:bɪtəʊn , ˌfɛn- ]( US phenobarbital ) ■ noun Medicine a narcotic and sedative barbiturate drug used chiefly to treat epilepsy. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004