(Chem.) A salt of sulphurous acid; called also sulfite.
2.
A person who is spontaneous and original in his habits of thought and conversation. (Archaic Slang) "A sulphite is a person who does his own thinking, he is a person who has surprises up his sleeve. He is explosive."
... of an acid on a sulphite. Sulphites are salts of sulphurous acid (H{2}SO{3}). When a sulphite is treated with an acid, sulphurous acid is set free, and being very unstable, decomposes into water and sulphur dioxide. These reactions ... — An Elementary Study of Chemistry • William McPherson
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