define sulfur
sulfur (usually uncountable, plural sulfurs) ( 1 uncountable) A chemical element (symbol S) with an atomic number of 16. ( 2 countable, uncountable) A yellowish green colour, like that of sulfur. sulfur colour:
Sulfur or sulphur (see spelling and etymology) is a chemical element with symbol S and atomic number 16. It is abundant, multivalent, and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with chemical formula S8. Elemental sulfur is a bright yellow crystalline solid at room temperature.