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Any of various sedative narcotics containing opium or one or more of its natural or synthetic derivatives.
(noun)
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A drug, hormone, or other chemical substance having sedative or narcotic effects similar to those containing opium or its derivatives: a natural brain opiate. Also called opioid.
(noun)
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Something that dulls the senses and induces relaxation or torpor.
(noun)
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Containing opium or any of its derivatives.
(adjective)
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Resembling opium or its derivatives in activity.
(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.