fluoride

n. ester of hydrofluoric acid that contains fluorine as one of the two elements (used to prevent tooth decay)

This article is about the chemical ion F −. For the addition of fluoride ions to water supplies, see Water fluoridation. Fluoride is the ionic form of fluorine. Fluorides are organic and inorganic compounds containing the element fluorine. As a halogen, fluorine forms a monovalent ion (−1 charge). Fluoride forms a binary compound with another element or radical. Examples of fluoride compounds include  hydrofluoric acid (HF), sodium fluoride (NaF) and calcium fluoride (CaF2), and uranium hexafluoride (UF6).
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Noun
1. a salt of hydrofluoric acid
(hypernym) halide
(hyponym) boron trifluoride
(derivation) fluoridate, fluoridize, fluoridise

n. fluoride, ester of hydrofluoric acid that contains fluorine as one of the two elements

n. fluoride, ester of hydrofluoric acid that contains fluorine as one of the two elements (used to prevent tooth decay)