tranquillizer

Variant of tranquilizer

or tranquillizer

noun

a person or thing that tranquilizes; esp., a depressant drug, as Valium or Librium, used as a calming agent in relieving and controlling various emotional disturbances, anxiety neuroses, certain psychoses, etc.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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