carried out at very low temperatures, near absolute zero.

Of, relating to, or performed at low temperatures.

The science and technology of the production of very low temperatures. / The scientific study of low-temperature phenomena.

(physics) a cryogenic liquid (that boils below about -160°C) used as a refrigerant

plural of cryogen

Treated with a cryogen

Any liquid (typically a liquified gas) with a very low boiling point

plural of cryogenic liquid

(geology) Of a geologic period within the Neoproterozoic era from about 850 to 600 million years ago.

(geology) The Cryogenian period.