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refrigerant (adj.)

1590s, originally of medicinal plasters, etc., "abating heat, cooling;" from Latin refrigerans, present participle of refrigerare "make cool or cold, to cool down," from re- "again" (see re-) + frigerare "make cool," from frigus (genitive frigoris) "cold" (see frigid). As a noun from 1670s, originally of medicinal agents; sense of "anything which abates heat, a freezing agent" is by 1885.

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Definitions of refrigerant from WordNet
1
refrigerant (n.)
any substance used to provide cooling (as in a refrigerator);
2
refrigerant (adj.)
causing cooling or freezing;
a refrigerant substance such as ice or solid carbon dioxide
Synonyms: refrigerating
From wordnet.princeton.edu