A compound of fluorine and another element, radical, etc.
Such a compound put in drinking water or toothpaste to prevent tooth decay.
Univalent fluorine, or a compound of fluorine, especially a binary compound of fluorine with a more electropositive element.
A compound containing fluorine and another element or radical. Fluorine combines readily with nearly all the other elements, except the noble gases, to form fluorides. In some countries, fluoride is added to the drinking water as a preventive measure against tooth decay.
Origin of fluoride
fluor(ine) + -ide