fluoride

noun

Etymology: Etymology tree English fluor(ine) Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idusder. English -ide English fluoride From fluor(ine) + -ide.

1. A binary compound of fluorine and another element or radical.
2. A binary compound of fluorine and another element or radical.

   “However, too much fluoride produces a mottling effect on teeth. Large doses of fluoride are actually toxic.”

   “The public health practice of adding fluoride to water supplies faces new scrutiny as a few recent reports raise concerns about potential health risks and suggest the benefits may not be as significant as they once were.”

3. The anionic form of a fluorine atom.