Disulphate

Di·sul'phate noun [ Prefix di- + sulphate .] (Chemistry) (a) A salt of disulphuric or pyrosulphuric acid; a pyrosulphate. (b) An acid salt of sulphuric acid, having only one equivalent of base to two of the acid.
Found on http://www.encyclo.co.uk/webster/D/99

Disulphate

• (n.) An acid salt of sulphuric acid, having only one equivalent of base to two of the acid. • (n.) A salt of disulphuric or pyrosulphuric acid; a pyrosulphate.
Found on http://thinkexist.com/dictionary/meaning/disulphate/
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