Ig·nit·or n. One who, or that which, produces ignition; especially, a contrivance for igniting the powder in a torpedo or the like. [Written also igniter.]
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  igniter
       n 1: a substance used to ignite or kindle a fire [syn: ignitor,
             lighter]
       2: a device for lighting or igniting fuel or charges or fires;
          "do you have a light?" [syn: lighter, light, ignitor]