cryogen

English Thesaurus

1. a liquid that boils at below -160 C and is used as a refrigerant (noun.substance)

hypernym	:	refrigerant,
definition	:	any substance used to provide cooling (as in a refrigerator) (noun.substance)

hyponym	:	liquid nitrogen,
definition	:	nitrogen in a liquid state (noun.substance)

hyponym	:	liquid air,
definition	:	air in a liquid state (noun.substance)