Science, Tech, Math › Science Refrigerant Definition (Chemistry) What Is a Refrigerant? Share Flipboard Email Print Chlorofluorocarbons are excellent refrigerants, although they pose an environmental hazard. BanksPhotos / Getty Images Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated July 24, 2017 Refrigerant Definition: A refrigerant is a compound that can readily absorb heat at one temperature, then compressed by a heat pump to a higher temperature and pressure where it changes phase and discharges the absorbed heat. Examples: Nearly all chlorofluorocarbons are refrigerants.