per·fluor·o·car·bon 
(pər-flrə-kär′bən, -flôr-)
(pər-flrə-kär′bən, -flôr-)n. Abbr. PFC
Any of a set of inert liquid or gaseous organic compounds that contain only carbon and fluorine and may be used as refrigerants and in other products in place of chlorocarbons. Perfluorocarbons are greenhouse gases.