fluoride

noun

often attributive
1
: a compound of fluorine
2
: the monovalent anion of fluorine

Examples of fluoride in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
To get there, technicians must chemically convert the yellowcake into uranium hexafluoride gas (a molecule containing one uranium atom and six fluorides) and feed it into centrifuges. Dan Vergano, Scientific American, 11 Mar. 2026 Encouraging your kid to brush their teeth twice a day, with a dab of fluoride toothpaste, will guard against cavities. Barrie Gillies, Parents, 9 Mar. 2026 Dentistry has long been built on prevention — fluoride, sealants, oral cancer screenings. Divya Upadhyay, STAT, 25 Feb. 2026 But note that this method will not remove fluoride or dissolved salts. Samantha Johnson, Martha Stewart, 6 Feb. 2026 See All Example Sentences for fluoride

Word History

First Known Use

1826, in the meaning defined at sense 1

Time Traveler
The first known use of fluoride was in 1826

Browse Nearby Words

Cite this Entry

“Fluoride.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fluoride. Accessed 13 Mar. 2026.

Kids Definition

fluoride

noun
flu·​o·​ride
ˈflu̇(-ə)r-ˌīd
: a compound of fluorine with another element or chemical group

Medical Definition

fluoride

noun
flu·​o·​ride ˈflu̇(-ə)r-ˌīd How to pronounce fluoride (audio)
1
: a compound of fluorine with a more electropositive element or radical
2
: the monovalent anion of fluorine
fluoride adjective

More from Merriam-Webster on fluoride

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster