noun plural but singular or plural in construction\-iks\(Medical Dictionary)
Medical Definition of CRYOGENICS
: a branch of physics that deals with the production and effects of very low temperatures
Study and use of low-temperature phenomena. The cryogenic temperature range is from 238°F (150°C) to absolute zero. At low temperatures, matter has unusual properties. Substances that are naturally gases can be liquefied at low temperatures, and metals lose electrical resistance as they get colder (seesuperconductivity). Cryogenics dates from 1877, when oxygen was first cooled to the point at which it became a liquid (297°F, or 183°C); superconductivity was discovered in 1911. Applications of cryogenics include the storage and transport of liquefied gases, food preservation, cryosurgery, rocket fuels, and superconducting electromagnets.