#halocarbon  one of various compounds of carbon and any of the halogens
  supertype:  #organic_compound__organiccompound  any compound of carbon and another element or a radical
  subtype:  #fluorocarbon  a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols
     subtype:  #chlorofluorocarbon__CFC  a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans; "CFCs cause depletion of atmospheric ozone"
     subtype:  #tetrafluoroethylene  a flammable gaseous fluorocarbon used in making plastics (polytetrafluoroethylene resins)

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