noun. The production of low temperatures or the study of low-temperature phenomena.

noun. the science and technology of the production of very low temperatures

noun. the scientific study of low temperature phenomena

noun. the branch of physics that studies the phenomena that occur at very low temperatures

"Basically, cryogenics, from the Greek word kryos, "icy cold", deals with the production of temperatures below that of liquid oxygen (-297 degrees F.)."

cryonics  

-genic  -ics  cryo-  

cryogen  cryogenic  

natural philosophy  physics  

Newtonian physics  absolute zero  acoustics  adiabatic absorption  adiabatic demagnetization