Standard Lemma guide

ondansetron

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • Received-Pronunciation: /ɒnˈdæn.sə.tɹɒn/
  • General-American: /ɑnˈdæn.səˌtɹɑn/
  • General-American: /ɑnˈdɑn.səˌtɹɑn/
  • General-American: /oʊnˈdɑn.səˌtɹɑn/

1

noun

Meaning 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.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

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