Hypertext Webster Gateway: "thiosulphate"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Thiosulphate \Thi`o*sul"phate\, n. (Chem.)
A salt of thiosulphuric acid; -- formerly called
{hyposulphite}.
Note: The sodium salt called in photography by the name
sodium hyposulphite, being used as a solvent for the
excess of unchanged silver chloride, bromide, and
iodide on the sensitive plate.
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