sulfur cycle, definition of

Cyclic movement of sulfur in different chemical forms from the environment, to organisms, and then back to the environment.

• Fools’ Gold Found to Regulate Global Oxygen
  The sulfur-based chemistry of iron pyrite may play a major role in atmospheric oxygen concentrations From The Weizmann Institute of Environmental Science: As sulfur cycles through Earth’s atmosphere, oceans and land, it undergoes chemical changes that...