1. An abundant tasteless odourless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)
   "Sulfur, atomic number 16, is used in the production of sulphuric acid"; "S, atomic number 16, is used in the production of sulphuric acid"; "sulphur, atomic number 16, is used in the production of sulphuric acid";
   - sulfur [N. Amer], S, sulphur [Brit, Cdn]

Type of: chemical element, element

Part of: black powder, metabolic indican, oil of vitriol, sulfide [N. Amer], sulfuric acid [N. Amer], sulphide [Brit, Cdn], sulphuric acid [Brit, Cdn], urinary indican, vitriol