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.
Another controversial study, finalized this year, suggested that high levels of fluoride lower the IQ of children. ArsTechnica, 23 Oct. 2025 The World Health Organization says fluoride is safe when used as recommended. Stephanie Armour, CNN Money, 16 Oct. 2025 About 110,000 residents receive fluoridated drinking water, according to the state’s environmental agency, while an additional 6,510 are served by water supplies with naturally occurring fluoride. Anna Clark, ProPublica, 13 Oct. 2025 Municipal water sources may have additives like chlorine or fluoride that can harm sensitive plants. Mary Marlowe Leverette, Southern Living, 9 Oct. 2025 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 29 Oct. 2025.

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
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