a. [ Fluo- + silicic: cf. F. fluosilicique. ] (Chem.) Composed of, or derived from, silicon and fluorine. [ 1913 Webster ]

Fluosilicic acid, a double fluoride of hydrogen and silicon, H2F6Si, obtained in solution in water as a sour fuming liquid, and regarded as the type of the fluosilicates; -- called also silicofluoric acid, and hydrofluosilicic acid. [ 1913 Webster ]

a. [ Hydro-, 2 + fluorine + silicic. ] (Chem.) Pertaining to, or denoting, a compound consisting of a double fluoride of hydrogen and silicon; silicofluoric. See Silicofluoric. [ 1913 Webster ]