Pyrosulphuric
Pronunciation : Pyr`o*sul*phu"ric
Part of Speech : a.
Etymology : [Pyro- + -sulphuric.] (Chem.)
Definition : Defn: Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration.
Source : Webster's Unabridged Dictionary, 1913