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Ignition may refer to:

  • Firelighting, the human act of creating a fire for warmth, cooking and other uses
  • Combustion, exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species
  • The point where the energy gain from a controlled Nuclear Fusion reaction is able to release energy at a greater rate, than is deposited into the fuel to overcome the activation energy barrier







  • Fusion ignition, the point at which a nuclear fusion reaction becomes self-sustaining
  • National Ignition Facility, fusion research facility located at the Lawrence Livermore National Laboratory in Livermore, California


  • Ignition system, a method for activating and controlling the combustion of fuel in an internal combustion engine.
  • Ignition switch, receptacle for a key used to start the engine in a vehicle.
  • Ignition coil, an induction coil in an automobile's ignition system that raises the battery's voltage to the levels necessary for a spark to ignite the fuel
  • H.E.I., high energy ignition, an electronic ignition system used by General Motors from 1974 to the mid-1980s


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