noun · 2 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:/ˌflʊə.ɹə(ʊ)ˈjʊə.ɹə.sɪl/
Received-Pronunciation:/ˌflɔː.ɹə(ʊ)ˈjʊə.ɹə.sɪl/
Received-Pronunciation:/ˌflɔː.ɹə(ʊ)ˈjɔː.ɹə.sɪl/
General-American:/ˌflʊɹ.oʊˈjʊɹ.əˌsɪl/
1
noun
Meaning 1
A fluorine-substituted derivative of uracil C4H3FN2O2 which inhibits DNA synthesis and is used as a chemotherapy drug in the treatment of cancer.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: medicine, pharmacology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
an antimetabolite used to treat certain cancers
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: antimetabolite
History
Etymology
Etymology tree Proto-Indo-European *bhel-der. Proto-Indo-European *bhlewH-der. Proto-Indo-European *bhluH-yé-ti? Latin fluō Proto-Indo-European *-os Proto-Indo-European *-s Proto-Indo-European *-ōs Proto-Italic *-ōs Latin -or Latin fluor Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English fluoro- English uracil English fluorouracil From fluoro- + uracil.