Bisulphide :: Bisulphide (n.) A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret..

Bisulphite :: Bisulphite (n.) A salt of sulphurous acid in which the base replaces but half the hydrogen of the acid; an acid sulphite.

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