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

In addition to whitening agents, the formula includes stannous fluoride, a specific type of fluoride that has antimicrobial properties to help target gingivitis, bad breath, and plaque buildup. —Sophia Panych, Allure, 16 Sep. 2025

The report recommends a reevaluation of the scientific research on fluoride in drinking water, and updates to CDC recommendations based on the findings. —Emily Kay Votruba, EverydayHealth.com, 12 Sep. 2025

The Kairos Hermes 2 fluoride salt cooled high temperature reactor (KP-FHR) using pebbled TRISO fuel, the first of its kind to be built, is designed to generate enough electricity to power about 36,000 homes. —Ariel Cohen, Forbes.com, 10 Sep. 2025

Other studies have found no impact of fluoride on IQ, and major health organizations have continued to recommend it be added to drinking water. —Joseph Choi, The Hill, 9 Sep. 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