an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3 Systematic name sulphuric(IV) acid
noun 1. a town in NE Texas.
- Sulphur trioxide
noun 1. a white corrosive substance existing in three crystalline forms of which the stable (alpha-) form is usually obtained as silky needles. It is produced by the oxidation of sulphur dioxide, and is used in the sulphonation of organic compounds. Formula: SO3 Systematic name sulphur(VI) oxide
- Sulphur tuft
noun 1. a poisonous basidiomycetous fungus, Hypholoma fasciculare, having a sulphurous yellow cap and found in clumps on and around broad-leaved trees
noun 1. (modifier) of, consisting of, or containing the divalent group, =SO2: sulphuryl chloride Also sulphonyl (ˈsʌlfəˌnɪl)