Source : Webster's Revised Unabridged Dictionary (1913)

Fluosilicate \Flu`o*sil"i*cate\, n. [Cf. F. fluosilicate.]
   (Chem.)
   A double fluoride of silicon and some other (usually basic)
   element or radical, regarded as a salt of fluosilicic acid;
   -- called also {silicofluoride}.

Source : WordNet®

fluosilicate
     n : salt of fluosilicic acid