Dictionary

cryogen

noun cryo·gen \ˈkrī-ə-jən\

Definition of CRYOGEN

:  a substance for obtaining low temperatures :  refrigerant —called also cryogenic

First Known Use of CRYOGEN

1875

cryogen

noun cryo·gen \ˈkrī-ə-jən\   (Medical Dictionary)

Medical Definition of CRYOGEN

:  a substance for obtaining low temperatures—called also cryogenic

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