ondansetron

== English == === Etymology === Probably from ond- (of unknown origin) +‎ se(ro)t(onin) r(eceptor) an(tag)on(ist). (This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) === Pronunciation === (Received Pronunciation) IPA(key): /ɒnˈdæn.sə.tɹɒn/ (General American) IPA(key): /ɑnˈdæn.səˌtɹɑn/, /ɑnˈdɑn.səˌtɹɑn/, /oʊnˈdɑn.səˌtɹɑn/ === Noun === ondansetron (uncountable) (pharmacology) 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. === References === “ondansetron”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “ondansetron”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.