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Noun: defogger  ,dee'fó-gur
Usage: N. Amer (elsewhere: demister)
  1. Heater that removes mist from the windshield of a car
    "He switched on the defogger to clear the foggy windscreen";
    - demister [Brit]

Derived forms: defoggers

Type of: heater, warmer

Encyclopedia: Defogger