chlorofluorocarbon: a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans
fluorocarbon: a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols
implantation: (embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals