The Collaborative International Dictionary of English v.0.48:

igniter \igniter\ n.
   1. a substance used to ignite or kindle a fire.

   Syn: ignitor, lighter.
        [WordNet 1.5]

   2. a device for lighting or igniting fuel or charges or
      fires.

   Syn: lighter, light, ignitor.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Ignitor \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.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

igniter
    n 1: a substance used to ignite or kindle a fire [syn:
         igniter, ignitor, lighter]
    2: a device for lighting or igniting fuel or charges or fires;
       "do you have a light?" [syn: lighter, light, igniter,
       ignitor]