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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



barbiturate  listen  (bar-BIH-chuh-rayt)

  A type of drug that causes a decrease in brain activity. Barbiturates may be used to treat insomnia, seizures, and convulsions, and to relieve anxiety and tension before surgery. A barbiturate is a type of central nervous system (CNS) depressant.