1. Compounds having the structure RSR (RH). Such compounds were once called @T06354@.
    See also:
    PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1368 [Terms] [Paper]
  2. In an inorganic sense, salts or other derivatives of hydrogen sulfide.
  3. A term used in @A00134@ nomenclature, see @I02948@.