opiate

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opiate

1. any of various narcotic drugs, such as morphine and heroin, that act on opioid receptors
2. any other narcotic or sedative drug
3. containing or consisting of opium

opiate

[′ō·pē·ət]
(pharmacology)
A sleep-inducing drug.
Any narcotic.
An opium preparation.
Any tranquilizing agent.