Di`sul*phu"ric (?), a. [Pref. di-
+ sulphuric.] (Chem.) Applied to an acid
having in each molecule two atoms of sulphur in the higher state of
oxidation.
Disulphuric acid, a thick oily liquid,
H2S2O7, called also Nordhausen
acid (from Nordhausen in the Harts, where it was
originally manufactured), fuming sulphuric acid, and
especially pyrosulphuric acid. See under
Pyrosulphuric.