cryogenic

This term is primarily used in scientific, engineering, and aerospace contexts to describe temperatures so low that gases liquefy. It carries a highly technical register and is rarely used in casual conversation unless referring to specific technologies like liquid nitrogen storage or rocket propulsion.

While it describes a state of extreme cold, it differs from "frozen" or "frigid" by implying a controlled, technological process of cooling. It is almost exclusively used as an adjective to modify hardware, fuels, or processes, rather than to describe the weather or a general feeling of coldness.