hydrofluosilicic acid

from WordNet (r) 3.0 (2006)

hydrofluosilicic acid
    n 1: an unstable poisonous corrosive acid known primarily in the
         form of its salts [syn: {fluosilicic acid},
         {hydrofluosilicic acid}]

from The Collaborative International Dictionary of English v.0.48

Fluosilicic \Flu`o*si*lic"ic\, 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]