Fluoridate definitions

flo͝or'ĭ-dāt', flôr'-
To add a fluorine compound to (a drinking water supply, for example) for the purpose of reducing tooth decay.
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To add fluorides to (a supply of drinking water) in order to reduce the incidence of caries in the teeth.
verb
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To add a fluorine compound to for the purpose of reducing tooth decay.

Fluoridated the town's water supply.

verb
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To add fluorine or a fluoride to something, especially to drinking water in order to prevent tooth decay.
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(chemistry, dentistry) To add fluoride to something, especially to drinking water in order to reduce tooth decay.
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Origin of fluoridate

Back formation from fluorination.