(organic chemistry) The organic sulfur compound (CH₃)₂S that is a breakdown product of many biological sulfur compounds; it has a number of industrial uses

(inorganic chemistry) The binary sulfide of ferrous iron, FeS, that occurs in several minerals

(inorganic chemistry) A white, crystalline powder (when pure), usually found in an impure, brown, non-crystalline form.

(inorganic chemistry) The mixed oxide and sulfide of carbon COS.

(mineralogy, chemistry) A family of chemical compounds and minerals with the chemical formula CuₓSᵤ.

(inorganic chemistry) A binary compound of sulfur and mercury that occurs naturally as cinnabar

(inorganic chemistry) a binary compound of silver and sulfur, Ag₂S

(inorganic chemistry) The inorganic compound Na₂S.

Synonym of mustard gas

(inorganic chemistry) Alternative spelling of iron sulphide