(modifier) another term (no longer in technical usage) for thionyl
noun 1. any salt or ester of sulphurous acid, containing the ions SO32– or HSO3– (hydrogen sulphite) or the groups –SO3 or –HSO3. The salts are usually soluble crystalline compounds
sulpho- pref. Variant of sulfo-.
/sʌlˈfɒnəˌmaɪd/ noun 1. any of a class of organic compounds that are amides of sulphonic acids containing the group –SO2NH2 or a group derived from this. An important class of sulphonamides are the sulfa drugs
sulfatidate sul·fa·ti·date (sŭl’fə-tī’dāt’) or sul·fa·tide (sŭl’fə-tīd’) n. Any of the cerebroside sulfuric esters containing sulfate groups in the sugar portion of the molecule.