text: * Cryogenics, the study of the production and behaviour of materials at very low temperatures and the study of producing extremely low temperatures 
  * Cryoelectronics, the study of superconductivity under cryogenic conditions and its applications 
  * Cryosphere, those portions of Earth's surface where water ice naturally occurs
  * Cryotron, a switch that uses superconductivity
  * Cryovolcano, a theoretical type of volcano that erupts volatiles instead of molten rock