refrigerating; cooling.
reducing bodily heat or fever.
a refrigerant agent, as a drug.
a liquid capable of vaporizing at a low temperature, as ammonia, used in mechanical refrigeration.
a cooling substance, as ice or solid carbon dioxide, used in a refrigerator.

1590–1600; < Latin refrīgerant- (stem of refrīgerāns), present participle of refrīgerāre. See refrigerate, -ant

nonrefrigerant, adjective, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
refrigerant (rɪˈfrɪdʒərənt)
1.  a fluid capable of changes of phase at low temperatures: used as the working fluid of a refrigerator
2.  a cooling substance, such as ice or solid carbon dioxide
3.  med an agent that provides a sensation of coolness or reduces fever
4.  causing cooling or freezing

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

refrigerant re·frig·er·ant (rĭ-frĭj'ər-ənt)

  1. Cooling or freezing; refrigerating.

  2. Reducing fever.

  1. A substance, such as air, ammonia, water, or carbon dioxide, used to provide cooling either as the working substance of a refrigerator or by direct absorption of heat.

  2. An agent used to reduce fever.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
refrigerant   (rĭ-frĭj'ər-ənt)  Pronunciation Key 
A substance, such as ice or ammonia, used to cool something by absorbing heat from it. Refrigerants are usually substances that evaporate quickly. In the process of evaporation they draw heat from surrounding substances.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In fact, you can freeze permafrost much colder than it would normally get by nature with a refrigerant plant that is train-mobile.
If sufficiently pressurised it can act as it's own refrigerant when used for air conditioning.
All refrigerators and air conditioners cool by evaporating a refrigerant, a process that absorbs heat.
Improperly handled refrigerant may result in physical harm.
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