To add a fluorine compound to (a drinking water supply, for example) for the purpose of reducing tooth decay.
To add fluorides to (a supply of drinking water) in order to reduce the incidence of caries in the teeth.
To add a fluorine compound to for the purpose of reducing tooth decay.
Fluoridated the town's water supply.
To add fluorine or a fluoride to something, especially to drinking water in order to prevent tooth decay.
Origin of fluoridate
Back formation from fluorination.