from
The Collaborative International Dictionary of English v.0.48
Hyposulphurous \Hy`po*sul"phur*ous\, a. [Pref. hypo- +
sulphurous.] (Chem.)
Pertaining to, or containing, sulphur, all, or a part, in a
low state of oxidation.
[1913 Webster]
{Hyposulphurous acid}.
(a) Thiosulphuric acid. [Obs.]
(b) An acid, {H2SO2}, obtained by the reduction of sulphurous
acid. It is not obtained in the free state, but in an
orange-yellow water solution, which is a strong reducing
and bleaching agent. Called also {hydrosulphurous acid}.
[1913 Webster]