[1] : The Collaborative International Dictionary of English v.0.48

sulphurous \sul"phurous\, a. l. sulphurosus, sulfurosus: cf.
   f. sulfureux.
   1. of or pertaining to sulphur.
      1913 webster

   2. chem.
      a derived from, or containing, sulphur; specifically,
          designating those compounds in which the element has a
          lower valence as contrasted with the sulphuric
          compounds.
      b having the characteristic odor of sulphur dioxide, or
          of hydrogen sulphide, or of other sulphur compounds.
          1913 webster

   sulphurous acid.
      a sulphur dioxide. see under sulphur. obs.
      b an acid, h2so3, not known in the free state except
          as a solution of sulphur dioxide in water, but forming
          a well-known series of salts the sulphites.

   sulphurous anhydride chem., sulphur dioxide. see under
      sulphur.
      1913 webster
see also:
sulphurous acid sulphur h2so3 sulphurous anhydride 

[2] : WordNet (r) 2.0

sulphurous
     adj 1: harsh or corrosive in tone; "an acerbic tone piercing
            otherwise flowery prose"; "a barrage of acid
            comments"; "her acrid remarks make her many enemies";
            "bitter words"; "blistering criticism"; "caustic jokes
            about political assassination, talk-show hosts and
            medical ethics"; "a sulfurous denunciation" syn: acerb,
             acerbic, acid, acrid, bitter, blistering, caustic,
             sulfurous, venomous, virulent, vitriolic
     2: characterized by oppressive heat and humidity; "the summer
        was sultry and oppressive"; "the stifling atmosphere";
        "the sulfurous atmosphere preceding a thunderstorm" syn:
        sultry, stifling, sulfurous
see also:
acerb acerbic acid acrid bitter blistering 
caustic sulfurous venomous virulent vitriolic 
sultry stifling 

Sulphurous >> S Words
Sulphurous, definition of term: Sulphurous
sulphurous_pag1.html

Sulphurous Acid >> S Words
Sulphurous Acid, definition of term: Sulphurous Acid
sulphurous+acid_pag1.html