- cryogenic (adj.)
- 1902, from cryogen "freezing mixture" (1875), from cryo- "freezing" + -genic "having to do with production" (see genus). Related: Cryogenics (1958).
- cryonics
- "The practice or technique of deep-freezing the bodies of people who have just died, in the hope that scientific advances may allow them to be revived in the future", 1960s: contraction of cryogenics.