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opiate

最后更新时间: 2025-04-27 04:07:03

noun

an alkaloid drug (such as morphine or codeine) that contains or is derived from opium, binds to cell receptors primarily of the central nervous system and gastrointestinal tract, acts to block pain, induce sedation or sleep, depress respiration, and produce calmness or euphoria, and is associated with physiological tolerance (see tolerance sense 4a(1)), physical and psychological dependence, and addiction upon repeated or prolonged use

a synthetic or semisynthetic drug (such as fentanyl or methadone) or an endogenous substance (such as beta-endorphin) that binds to opiate cell receptors and produces physiological effects like those of opium derivatives: opioid sense 1 Current peptide research has uncovered at least two groups of endogenous opiates in the CNS that modulate the perception of pain.—Nicholas T. ZervasNote: The use of opiate for substances that bind to opiate receptors but are not opium derivatives is often considered technically incorrect. Such substances are more commonly referred to as opioids. The word opioid itself was originally used only for these substances, but it has now become widely accepted as a broader term encompassing any substance—natural, synthetic, opium-derived or not—that binds to opiate receptors and has morphine-like activity.

… fentanyl, a synthetic opiate that is 90-100 times more potent than morphine.—The Economist

something likened to a drug that induces rest or inaction or quiets uneasiness … the novel's real drug is the opiate of nostalgia. Richard, narrating the events at a distance of ten years, is still too in love with the friends to look at them with an even faintly critical eye.—Ruth Franklin

Operatic music is an opiate that lowers our critical guard and allows us to entertain views that our good liberal selves would disavow were they presented in naked prose.—Paul Robinson

adjective

containing or mixed with opium

of, relating to, binding, or being an opiate

opiate receptors

inducing sleep : narcotic

causing dullness or inaction

opiate1 of 2noun

an alkaloid drug (as morphine or codeine) that contains or is derived from opium, binds to cell receptors primarily of the central nervous system and gastrointestinal tract, acts to block pain, induce sedation or sleep, depress respiration, and produce calmness or euphoria, and is associated with physiological tolerance (see tolerance sense 1), physical and psychological dependence, and addiction upon repeated or prolonged use

a synthetic or semisynthetic drug (as fentanyl or methadone) or an endogenous substance (as beta-endorphin) that binds to opiate cell receptors and produces physiological effects like those of opium derivatives: opioid Current peptide research has uncovered at least two groups of endogenous opiates in the CNS that modulate the perception of pain.—Nicholas T. ZervasNote: The use of opiate for substances that bind to opiate receptors but are not opium derivatives is often considered technically incorrect. Such substances are more commonly referred to as opioids. The word opioid itself was originally used only for these substances, but it has now become widely accepted as a broader term encompassing any substance—natural, synthetic, opium-derived or not—that binds to opiate receptors and has morphine-like activity.

… fentanyl, a synthetic opiate that is 90-100 times more potent than morphine.—The Economist

opiate2 of 2adjective

of, relating to, or being opium or an opium derivative

of, relating to, binding, or being an opiate

opiate receptors

opiate

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