Having a very low temperature (approaching absolute zero: 0 K/−273.15°C). Some rocket propellants, such the fuel used by the Titan 4 rocket for its Centaur upper stage, are cryogenic.
Geology and Earth Sciences
1. Applied to: features or materials generated by the action of ice;
2. instruments operating a few degrees above absolute zero (0 K = −273.15 °C).
Geography
Processes carried out by ground ice. Needle ice and frost heaving are connected with the development of cryogenic phenomena (Grab et al. (2004) Geografiska. B 86, 2).