fluoride

noun

fluo·​ride ˈflȯr-ˌīd  ˈflu̇r- 

often attributive

1

: a compound of fluorine

2

: the monovalent anion of fluorine

Examples of fluoride in a Sentence

Recent Examples on the Web

The center is also responsible for regulating products like antiperspirants, sunscreens and fluoride toothpaste, as well as making recommendations to update drug labeling. —Jen Christensen, CNN Money, 11 Nov. 2025

For adults, statewide campaigns focus on fluoride use, nutrition, and regular cleanings — small actions that can reduce disease rates dramatically over time. —Sixteen Ramos, AZCentral.com, 6 Nov. 2025

If successful, this could mark the biggest leap in dental care since the advent of fluoride toothpaste. —Neetika Walter, Interesting Engineering, 5 Nov. 2025

Popular products that use fluoride include toothpaste and mouthwash, which incorporate the mineral to reduce bacteria in the mouth and reduce chances of cavities. —Surina Venkat, The Hill, 31 Oct. 2025

Word History

First Known Use

1826, in the meaning defined at sense 1

Phrases Containing fluoride

• hydrogen fluoride
• lithium fluoride
• sodium fluoride

Rhymes for fluoride

• abide
• allied
• applied
• aside
• astride
• azide
• backside
• bankside
• bastide
• bayside
• bedside
• belied

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 

1

: a compound of fluorine with a more electropositive element or radical

2

: the monovalent anion of fluorine

fluoride adjective