fluorine

F4L1U1O1R1I1N1E1
US/ˈflʊ(ə)ɹˌinUS-ɪn/US/ˈfloɹˌin

noun

The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

“an octahedron of fluorines”

Similar
phthorFatomic number 9

Meanings

nounfluorine (countable and uncountable, plural fluorines)

plural fluorines

  1. uncountablechemistryThe chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.

    an octahedron of fluorines

    1. countablechemistryAn atom of this element.

Synonyms & antonyms

Similar

nouna nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

Similar
Fatomic number 9
Also see

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*bʰel-
  2. Proto-Indo-European*bʰlewH-
  3. Proto-Indo-European*bʰluH-yé-ti?
  4. Latinfluō
  5. Latinfluor
  6. Englishfluorine

From Latin fluor (“flow”) + English -ine. Coined by British chemist Humphry Davy in 1813.

Full word history & related roots →

Translations

Afrikaans fluoor
  • fluoorchemical element
Arabic فُلُور
  • فُلُور (fulūr)chemical element
Basque fluoroa
  • fluoroachemical element
Bengali ফ্লুরিন
  • ফ্লুরিন (phlurin)chemical element
Bulgarian флуо́р
  • флуо́р (fluór)chemical element
Catalan fluor
  • fluorchemical element
Chinese Mandarin 氟
  • 氟 (fú)chemical element
Czech fluor
  • fluorchemical element
Danish fluor
  • fluorchemical element
Dutch fluor
  • fluorchemical element
Esperanto fluoro
  • fluorochemical element
Estonian fluor
  • fluorchemical element
Finnish fluori
  • fluorichemical element
French fluor, phthore
  • fluorchemical element
  • phthorechemical element
German Fluor
  • Fluorchemical element
Greek φθόριο
  • φθόριο (fthório)chemical element
Hawaiian fluorine
  • fluorinechemical element
Hebrew פלואור
  • פלואור (fluor)chemical element
Hindi तरस्विनी
  • तरस्विनी (tarasvinī)chemical element
Hungarian fluor
  • fluorchemical element
Icelandic flúor, flúr
  • flúorchemical element
  • flúrchemical element
Indonesian fluor
  • fluorchemical element
Irish fluairín
  • fluairínchemical element
Italian fluoro
  • fluorochemical element
Japanese フッ素, 弗素
  • フッ素 (fusso)chemical element
  • 弗素 (fusso)chemical element
  • フッソ (fusso)chemical element
  • 氟素 (fusso)chemical element
Korean 불소, 플루오르
  • 불소 (bulso)chemical element
  • 플루오르 (peulluoreu)chemical element
  • 플루오린 (peulluorin)chemical element
Latin fluorum
  • fluorumchemical element
Latvian fluors
  • fluorschemical element
Lithuanian fluoras
  • fluoraschemical element
Malay fluorin
  • fluorinchemical element
Māori pūkōwhai
  • pūkōwhaichemical element
Norwegian Bokmål fluor
  • fluorchemical element
Persian فلوئور
  • فلوئور (folu'or, felo'or, flu'or)chemical element
Polish fluor
  • fluorchemical element
Portuguese flúor
  • flúorchemical element
Punjabi ਫਲੋਰੀਨ
  • ਫਲੋਰੀਨ (phlōrīn)chemical element
Romanian fluor
  • fluorchemical element
Russian фтор
  • фтор (ftor)chemical element
Scottish Gaelic fluorain
  • fluorainchemical element
Slovak fluór
  • fluórchemical element
Spanish flúor
  • flúorchemical element
Swahili florini
  • florinichemical element
Swedish fluor
  • fluorchemical element
Tamil ஃவுளூரின், வினைவியம்
  • ஃவுளூரின் (ḥvuḷūriṉ)chemical element
  • வினைவியம் (viṉaiviyam)chemical element
  • புளோரின் (puḷōriṉ)chemical element
Thai ฟลูออรีน
  • ฟลูออรีน (fluu-ɔɔ-riin)chemical element
Turkish flor
  • florchemical element
Ukrainian фтор
  • фтор (ftor)chemical element
Urdu فلورین
  • فلورین (florīn)chemical element
Vietnamese flo
  • flochemical element
Welsh fflworin
  • fflworinchemical element
Cite this entry
APA

fluorine. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/fluorine

MLA

“fluorine.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fluorine. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “fluorine,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/fluorine.

Source: fluorine on Wiktionary, CC BY-SA 4.0.