[bahr-bich-er-it, -uh-reyt; bahr-bi-toor-it, -eyt, -tyoor-]
noun Pharmacology.
any of a group of barbituric acid derivatives, used in medicine as sedatives and hypnotics.

1925–30; barbitur(ic) + -ate2

nonbarbiturate, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
barbiturate (bɑːˈbɪtjʊrɪt, -ˌreɪt)
a derivative of barbituric acid, such as phenobarbital, used in medicine as a sedative, hypnotic, or anticonvulsant

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1928, from Ger., coined 1863 by chemist Adolf von Baeyer (1835-1917) from Barbitursäure "barbituric acid," coined perhaps from woman's name Barbara, or perhaps from L. barbata, in M.L. usnea barbata, lit. "bearded moss." Second element is because it was obtained from uric acid.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

barbiturate bar·bi·tu·rate (bär-bĭch'ər-ĭt, -ə-rāt', bär'bĭ-tur'ĭt, -āt', -tyur'-)

  1. A salt or ester of barbituric acid.

  2. Any of a group of barbituric acid derivatives that act as central nervous system depressants and are used as sedatives or hypnotics.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
barbiturate   (bär-bĭch'ər-ĭt)  Pronunciation Key 
Any of a group of drugs that act as depressants of the central nervous system, are highly addictive, and are used primarily as sedatives and anticonvulsants. Phenobarbital and pentobarbital are examples of barbiturates.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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