Bisulphate
Pronunciation : Bi*sul"phate
Part of Speech : n.
Etymology : [Pref. bi- + sulphate.] (Chem.)
Definition : Defn: A sulphate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal sulphates; an acid sulphate.
Source : Webster's Unabridged Dictionary, 1913