Hyposulphurous

Part of speech: adjective (a.)

Pertaining to, or containing, sulphur, all, or a part, in a low state of oxidation. 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.