Etymology
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cryogenic (adj.)

"of or involving very low temperatures," 1896, from cryo- "freezing" + -genic "having to do with production" (from PIE root *gene- "give birth, beget"). Cryogen "freezing mixture, that which produces cold" is attested from 1875. Related: Cryogenics (1958).

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Definitions of cryogenic

cryogenic (adj.)
of or relating to very low temperatures;
From wordnet.princeton.edu