phenobarbitone
Concise Oxford English Dictionary © 2008 Oxford University Press:
phenobarbitone /ˌfiːnə(ʊ)ˈbɑːbɪtəʊn, ˌfɛn-/ (US phenobarbital)
▶noun Medicine a narcotic and sedative barbiturate drug used chiefly to treat epilepsy.
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