REFRIGERANT

adj. chilling, cooling, refrigerating, serving to lower temperature; refreshing, invigorating (Archaic)

n. cooling agent, any item or substance that lowers temperature

A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. The two main uses of refrigerants are refrigerators/freezers and air conditioners. Cf. coolant.Until concerns about depletion of the ozone layer arose in the 1980s, the most widely used refrigerants were the halomethanes R-12 and R-22, with R-12 being more common in automotive air conditioning and small refrigerators, and R-22 being used for residential and light commercial air conditioning, refrigerators, and freezers. Some very early systems used R-11 because its relatively high boiling point allows low-pressure systems to be constructed, reducing the mechanical strength required for components. New production of R-12 ceased in the United States in 1995, and R-22 is to be phased out in 2010.  R-134a and certain blends are now replacing chlorinated compounds. One popular 50/50 blend of R-32 and R-125 now being increasingly substituted for R-22 is R410a, often marketed under the trade name Puron®. While the R-22, R-12 and other ozone depleting refrigerants are being phased out, they still have value and can be easily sold.
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Noun
1. a substance used to provide cooling (as in a refrigerator)
(hypernym) substance, matter
(hyponym) cryogen
(derivation) refrigerate
Adjective
1. causing cooling or freezing; "a refrigerant substance such as ice or solid carbon dioxide"
(synonym) refrigerating
(similar) cold

adj. refrigerant, chilling, cooling, refrigerating, serving to lower temperature; refreshing

v. refrigerate, make cold, chill

(n.)
That which makes to be cool or cold; specifically, a medicine or an application for allaying fever, or the symptoms of fever; -- used also figuratively.
  

(a.)
Cooling; allaying heat or fever.