fluo·​rine | \ ˈflu̇r-ˌēn How to pronounce fluorine (audio) , ˈflȯr- \

Definition of fluorine

: a nonmetallic gaseous chemical element of the halogen group with atomic number 9 that readily forms compounds with almost all other elements including some noble gases — see Chemical Elements Table

Examples of fluorine in a Sentence

Recent Examples on the Web Coating the electrode with a water-repellent, fluorine-rich polymer can help. Robert F. Service, Science | AAAS, "Making commodity chemicals requires fossil fuels. New devices could do it with renewables," 4 May 2020 Donora’s top attraction is still its Smog Museum, a tribute to a fluorine-laden inversion in 1948 that killed 20 people. Paul Daugherty, Cincinnati.com, "Paul Daugherty: The 1975 World Series had to end this way.," 11 Apr. 2020 The team hopes that adding fluorine to the membrane will repel the water. Robert F. Service, Science | AAAS, "Next generation water splitter could help renewables power the globe," 10 Mar. 2020 Chemists created thousands of such compounds by bonding carbon to fluorine in chemical chains, forging one of the strongest bonds ever discovered. Michele Cohen Marill, Wired, "Scientists Fight Back Against Toxic ‘Forever’ Chemicals," 15 Jan. 2020 The face fabric is Bluesign approved and treated with a fluorine-free water repellent. Aleta Burchyski, Outside Online, "I Tried to Hate the Amazon Parka, But It Won Me Over," 26 Jan. 2020 It’s created by joining carbon and fluorine, one of the strongest bonds that can be made in organic chemistry. National Geographic, "Toxic ‘forever chemicals’ more common in tap water than thought, report says," 24 Jan. 2020 The eruption killed 60 percent of the livestock on Iceland due to animals ingesting fluorine the volcano emitted. Anchorage Daily News, "“Active mass movements” are increasing along the Denali Park road — and may bury it," 18 Jan. 2020 Publishing this Monday in Physical Review Letters, the Riken physicists and their team confirmed that the limit for a fluorine nucleus is 22 neutrons, and a neon nucleus can contain up to 24. Wired, "What Makes an Element? The Frankenstein of Sodium Holds Clues," 22 Nov. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fluorine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fluorine

1813, in the meaning defined above

History and Etymology for fluorine

French, from New Latin fluor

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Time Traveler for fluorine

Time Traveler

The first known use of fluorine was in 1813

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Statistics for fluorine

Last Updated

16 May 2020

Cite this Entry

“Fluorine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluorine. Accessed 25 May. 2020.

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More Definitions for fluorine


fluo·​rine | \ ˈflu̇r-ˌēn How to pronounce fluorine (audio) , ˈflȯr- \

Kids Definition of fluorine

: a yellowish flammable irritating gaseous chemical element


fluo·​rine | \ ˈflu̇(-ə)r-ˌēn How to pronounce fluorine (audio) , -ən How to pronounce fluorine (audio) \

Medical Definition of fluorine

: a nonmetallic monovalent halogen element that is normally a pale yellowish flammable irritating toxic gas symbol F — see Chemical Elements Table

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More from Merriam-Webster on fluorine

Rhyming Dictionary: Words that rhyme with fluorine

Spanish Central: Translation of fluorine

Nglish: Translation of fluorine for Spanish Speakers

Britannica.com: Encyclopedia article about fluorine

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