fluoride
noun/ˈflɔːraɪd/, /ˈflʊəraɪd/
/ˈflɔːraɪd/, /ˈflʊraɪd/
- a chemical containing fluorine that protects teeth from decay (= damage from natural causes or lack of care) and is often added to toothpaste and sometimes to drinking waterTopics Physics and chemistryc2Word Originearly 19th cent.: from fluorine + -ide.
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fluoride