What is "thialol"

Thialol \Thi"al*ol\, n. [Thio- + alcohol + L. oleum oil.] (Chem.) A colorless oily liquid, (C2H5)2S2, having a strong garlic odor; -- called also ethyl disulphide. By extension, any one of the series of related compounds.

n. (context obsolete organic compound English) diethyldisulfide (C₂H₅)₂S₂