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

Fluorine is then released into the water as fluoride ions, while hydroxyl radicals and hydroxide ions help sever carbon-carbon bonds in the remaining molecular chains. — Alexandra Harrell, Footwear News, 14 Oct. 2026

For people whose dry mouth stems from a medical condition or medication, dentists often recommend an alcohol-free rinse with fluoride instead. — Hanna Wickes, Sacbee.com, 5 Oct. 2026

The company also claims electrodes using 1% RaiCure binder can achieve twice the electronic conductivity of conventional electrodes made with polyvinylidene fluoride, or PVDF, binders. — Neetika Walter, Interesting Engineering, 1 Oct. 2026

Your dentist may recommend fluoride toothpaste, fluoride treatments, or other ways to protect your teeth. — Julie Scott, Verywell Health, 17 Sep. 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