| sulphurous | 1. Of or pertaining to sulphur. 2. <chemistry> Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a lower valence as contrasted with the sulphuric compounds. Having the characteristic odour of sulphur dioxide, or of hydrogen sulphide, or of other sulphur compounds. Sulphurous acid. Sulphur dioxide. See Sulphur. 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). <chemistry> Sulphurous anhydride, sulphur dioxide. See Sulphur. Origin: L. Sulphurosus, sulfurosus: cf. F. Sulfureux. Source: Websters Dictionary (01 Mar 1998) |
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| sulphurwort | <botany> The hog's fennel. See Fennel. Source: Websters Dictionary (01 Mar 1998) |
| sulphury | Resembling, or partaking of the nature of, sulphur; having the qualities of sulphur. Source: Websters Dictionary (01 Mar 1998) |
| sulphuryl | <chemistry> The hypothetical radical SO2; called also sulphon. Sulphuryl chloride, a chloride, pungent, fuming liquid, SO2.Cl2, obtained by the action of phosphorus pentachloride on sulphur trioxide. On treatment with water it decomposes into sulphuric and hydrochloric acids, and is hence called also sulphuric chloranhydride. Origin: Sulphur + -yl. Source: Websters Dictionary (01 Mar 1998) |
| sulphydrate | <chemistry> A compound, analogous to a hydrate, regarded as a salt of sulphydric acid, or as a derivative of hydrogen sulphide in which one half of the hydrogen is replaced by a base (as potassium sulphydrate, KSH), or as a hydrate in which the oxygen has been wholly or partially replaced by sulphur. Source: Websters Dictionary (01 Mar 1998) |
| sulphydric | <chemistry> Of, pertaining to, or designating, hydrogen sulphide, which is regarded as an acid, especially when in solution. Source: Websters Dictionary (01 Mar 1998) |
| sulphydryl reagent | <chemical, pharmacology> Compounds that bind to SH groups. Include p chlormercuribenzoate, N ethyl maleimide, iodoacetamide. Very important in studies of protein structure. (18 Nov 1997) |