noun
: a chloride of sulfur: as
a. : a yellow fuming irritating corrosive toxic liquid S 2 Cl 2 that is made usually by reaction of chlorine with molten sulfur and often contains sulfur or sulfur dichloride and that is used chiefly as a chlorinating or sulfurizing agent or as both simultaneously, in making vulcanized oils, and in the cold cure of rubber; di-sulfur dichloride — called also sulfur monochloride
b. : sulfur dichloride