hydrochlorofluorocarbon: a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere
chlorofluorocarbon: a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans
decree nisi: a decree issued on a first petition for divorce; becomes absolute at some later date