Sulphurous /(?)/

Sul·phur·ous

Sulphurous

a.
  1. Of or pertaining to sulphur.
  2. Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a lower valence as contrasted with the sulphuric compounds. (Chem.)

Phrases & Compounds
Sulphurous acid
Sulphur dioxide. See under Sulphur.
Sulphurous anhydride
sulphur dioxide. See under Sulphur.