naloxone.
An opioid inverse agonist used to counter the effects of an overdose on opioids (such as heroin or morphine).
Meaning & usage
An opioid inverse agonist used to counter the effects of an overdose on opioids (such as heroin or morphine).
Where this word comes from
Etymology tree English nal- Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Hellenic *údōr Ancient Greek ῡ̆̔́δωρ (hū̆́dōr) Ancient Greek ῠ̔δρο- (hŭdro-)lbor. English hydro- English oxy English (hydr)ox(y) German Ketonbor. English ketone English -one English naloxone From nal- (“opioid receptor antagonist/agonist”) + (hydr)ox(y) + -one.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.