Definition of barbiturate noun from the Oxford Advanced American Dictionary

 

barbiturate

 noun
noun
NAmE//bɑrˈbɪtʃərət//
 
 
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a powerful drug that makes you feel calm and relaxed, or puts you to sleep. There are several types of barbiturates He died from an overdose of barbiturates.
See the Oxford Advanced Learner's Dictionary entry: barbiturate