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Define the word hydrofluosilicic acid

"hydrofluosilicic acid" gcide "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]

"hydrofluosilicic acid" wn "WordNet (r) 2.0"

hydrofluosilicic acid
     n : an unstable poisonous corrosive acid know primarily in the
         form of its salts [syn: fluosilicic acid]