Definitions for "Liquid nitrogen"
Nitrogen gas condensed to a liquid with a boiling point of about -196°C. Very commonly the medium in which containers of genetic material are stored. See cryopreservation.
dry ice used to exfoliate the skin or freeze off unwanted tissue
Nitrogen gas condensed to a liquid with a boiling point of about -196°C. Commonly used as a medium for long-term storage of biological materials.