fluoridation
noun/ˌflɔːrɪˈdeɪʃn/, /ˌflʊərɪˈdeɪʃn/
/ˌflɔːrɪˈdeɪʃn/, /ˌflʊrɪˈdeɪʃn/
[uncountable]- the practice of adding fluoride to drinking water to prevent tooth decay (= damage from natural causes or lack of care)
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fluoridation