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2 definitions found
 for sulphurous anhydride
From The Collaborative International Dictionary of English v.0.48 :

  Sulphur \Sul"phur\, n. [L., better sulfur: cf. F. soufre.]
     1. (Chem.) A nonmetallic element occurring naturally in large
        quantities, either combined as in the sulphides (as
        pyrites) and sulphates (as gypsum), or native in volcanic
        regions, in vast beds mixed with gypsum and various earthy
        materials, from which it is melted out. Symbol S. Atomic
        weight 32. The specific gravity of ordinary octohedral
        sulphur is 2.05; of prismatic sulphur, 1.96.
        [1913 Webster]
  
     Note: It is purified by distillation, and is obtained as a
           lemon-yellow powder (by sublimation), called flour, or
           flowers, of sulphur, or in cast sticks called roll
           sulphur, or brimstone. It burns with a blue flame and a
           peculiar suffocating odor. It is an ingredient of
           gunpowder, is used on friction matches, and in medicine
           (as a laxative and insecticide), but its chief use is
           in the manufacture of sulphuric acid. Sulphur can be
           obtained in two crystalline modifications, in
           orthorhombic octahedra, or in monoclinic prisms, the
           former of which is the more stable at ordinary
           temperatures. Sulphur is the type, in its chemical
           relations, of a group of elements, including selenium
           and tellurium, called collectively the sulphur group,
           or family. In many respects sulphur resembles oxygen.
           [1913 Webster]
  
     2. (Zool.) Any one of numerous species of yellow or orange
        butterflies of the subfamily Pierinae; as, the clouded
        sulphur ({Eurymus philodice syn. Colias philodice),
        which is the common yellow butterfly of the Eastern United
        States.
        [1913 Webster]
  
     Amorphous sulphur (Chem.), an elastic variety of sulphur of
        a resinous appearance, obtained by pouring melted sulphur
        into water. On standing, it passes back into a brittle
        crystalline modification.
  
     Liver of sulphur. (Old Chem.) See Hepar.
  
     Sulphur acid. (Chem.) See Sulphacid.
  
     Sulphur alcohol. (Chem.) See Mercaptan.
  
     Sulphur auratum [L.] (Old Chem.), a golden yellow powder,
        consisting of antimonic sulphide, Sb2S5, -- formerly a
        famous nostrum.
  
     Sulphur base (Chem.), an alkaline sulphide capable of
        acting as a base in the formation of sulphur salts
        according to the old dual theory of salts. [Archaic]
  
     Sulphur dioxide (Chem.), a colorless gas, SO2, of a
        pungent, suffocating odor, produced by the burning of
        sulphur. It is employed chiefly in the production of
        sulphuric acid, and as a reagent in bleaching; -- called
        also sulphurous anhydride, and formerly sulphurous
        acid.
  
     Sulphur ether (Chem.), a sulphide of hydrocarbon radicals,
        formed like the ordinary ethers, which are oxides, but
        with sulphur in the place of oxygen.
  
     Sulphur salt (Chem.), a salt of a sulphacid; a sulphosalt.
        
  
     Sulphur showers, showers of yellow pollen, resembling
        sulphur in appearance, often carried from pine forests by
        the wind to a great distance.
  
     Sulphur trioxide (Chem.), a white crystalline solid, SO3,
        obtained by oxidation of sulphur dioxide. It dissolves in
        water with a hissing noise and the production of heat,
        forming sulphuric acid, and is employed as a dehydrating
        agent. Called also sulphuric anhydride, and formerly
        sulphuric acid.
  
     Sulphur whale. (Zool.) See Sulphur-bottom.
  
     Vegetable sulphur (Bot.), lycopodium powder. See under
        Lycopodium.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Sulphurous \Sul"phur*ous\, 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]

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