| disulphuric | <chemistry> 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 Pyrosulphuric. Origin: Pref. Di- + sulphuric. Source: Websters Dictionary (01 Mar 1998) |
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