The Collaborative International Dictionary
silicofluoride
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.
Wiktionary
silicofluoride
n. (context chemistry English) A fluosilicate; a salt of silicofluoric acid.