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 AquaTru Classic is a highly effective countertop reverse osmosis system with a four-stage filtration process that removes up to 99 percent of more than 80 contaminants, including lead, fluoride and PFAS. —Nora Colomer, FOXNews.com, 6 Sep. 2025

States such as Utah and Florida have banned fluoride in public drinking water, while scientists and dental health organizations have warned that Kennedy's plan is disastrous for public health. —Swapna Venugopal Ramaswamy, USA Today, 29 Aug. 2025

The group is now investigating how to prevent lubricants used in electric vehicles from foaming; developing sustainable surfactants that don't contain fluoride or silicon; and finding ways to use proteins to stabilize milk foam, among other projects. —Jennifer Ouellette, ArsTechnica, 26 Aug. 2025

The American Dental Association recommends only toothpastes that contain fluoride. —Elizabeth Cohen, NBC news, 24 Aug. 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