Source : Webster's Revised Unabridged Dictionary (1913)

Fluoride \Flu"or*ide\ (? or ?; 104), n. [Cf. F. fluoride.]
   (Chem.)
   A binary compound of fluorine with another element or
   radical.

   {Calcium fluoride} (Min.), fluorite, {CaF2}. See {Fluorite}.

Source : WordNet®

fluoride
     n : a salt of hydrofluoric acid