disulphate

Century Dictionary and Cyclopedia

1. n. In chem., a sulphate containing a hydrogen atom replaceable by a basic element or radical; an acid sulphate.
2. n. A sulphate having the general formula R₂S₂O₇; a salt of disulphuric acid: as, potassium disulphate, K₂S₂O₇.

Wiktionary

1. n. chemistry A salt or ester of disulphuric acid or pyrosulphuric acid; a pyrosulphate.
2. n. chemistry An acid salt of sulphuric acid, having only one equivalent of base to two of the acid.

GNU Webster's 1913

1. n. A salt of disulphuric or pyrosulphuric acid; a pyrosulphate.
2. n. An acid salt of sulphuric acid, having only one equivalent of base to two of the acid.