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ondansetron.

A carbazole derivative (trademark Zofran), C₁₈H₁₉N₃O, that is a serotonin receptor antagonist administered by injection and by mouth to relieve nausea and vomiting, especially during cancer therapy.

11 characters4 syllables approx.English language

Meaning & usage

noun/ɒnˈdæn.sə.tɹɒn/Received-Pronunciation/ɑnˈdæn.səˌtɹɑn/General-American/ɑnˈdɑn.səˌtɹɑn/General-American/oʊnˈdɑn.səˌtɹɑn/General-American
  1. A carbazole derivative (trademark Zofran), C₁₈H₁₉N₃O, that is a serotonin receptor antagonist administered by injection and by mouth to relieve nausea and vomiting, especially during cancer therapy.

    uncountable
Where this word comes from

Probably from ond- (of unknown origin) + se(ro)t(onin) r(eceptor) an(tag)on(ist).

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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.