Hyposulphuric acid
| an acid, H2S2O6, obtained by the action of manganese dioxide on sulphur dioxide, and known only in a watery solution and in its salts; - called also dithionic acid. See Dithionic. |
See also: Hyposulphuric
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.