re·frig·er·ant (r?-fr?j??r-?nt)adj.1. Cooling or freezing; refrigerating.2. Medicine Reducing fever.n.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. Medicine An agent used to reduce fever.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.refrigerant (r??fr?d??r?nt) n1. (General Physics) a fluid capable of changes of phase at low temperatures: used as the working fluid of a refrigerator2. (General Physics) a cooling substance, such as ice or solid carbon dioxide3. (Medicine) med an agent that provides a sensation of coolness or reduces feveradjcausing cooling or freezingCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014re?frig?er?ant (r??fr?d? ?r ?nt) adj. 1. refrigerating; cooling. 2. reducing bodily heat or fever. n. 3. a refrigerant agent, as a drug. 4. a liquid capable of vaporizing at a low temperature, as ammonia, used in mechanical refrigeration. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.re·frig·er·ant (r?-fr?j??r-?nt) 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® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.