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

Dentists can also sometimes stop cavities with fluoride varnishes and prevent them with dental sealants, which were once recommended only for children, Fontana said. —The New York Times News Service Syndicate, San Diego Union-Tribune, 26 May 2026

The electrodes were constructed by casting a slurry onto aluminum foil using binders such as polyvinylidene fluoride, sodium carboxymethyl cellulose, and styrene-butadiene rubber, along with conductive carbon additives. —Aman Tripathi, Interesting Engineering, 9 May 2026

In the sketch, Sherman wore oversized fake teeth and mocked Wood’s Manchester accent in a line about removing fluoride from water and eating monkeys. —Larisha Paul, Rolling Stone, 29 Apr. 2026

But the joke was about fluoride. —Brendan Morrow, USA Today, 29 Apr. 2026

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