Disulphide

from The Collaborative International Dictionary of English v.0.48

Disulphide \Di*sul"phide\ (?; 104), n. [Pref. di- + sulphide.]
   (Chem.)
   A binary compound of sulphur containing two atoms of sulphur
   in each molecule; -- formerly called disulphuret. Cf.
   {Bisulphide}.
   [1913 Webster]