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phenobarbital


phe·no·bar·bi·tal

noun \ˌfē-nō-ˈbär-bə-ˌtȯl\

Definition of PHENOBARBITAL

: a crystalline barbiturate C12H12N2O3 used as a hypnotic, sedative, and anticonvulsant
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First Known Use of PHENOBARBITAL

1919

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