\bär-ˈbich-ə-rət, -ˌrāt; ˌbär-bə-ˈt(y)u̇r-ət, -ˈt(y)u̇(ə)r-ˌāt\
: a salt or ester of barbituric acid
: any of various derivatives of barbituric acid (as phenobarbital) that are used especially as sedatives, hypnotics, and antispasmodics and are often addictive
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