spark coil

from WordNet (r) 3.0 (2006)

spark coil
    n 1: an induction coil used to create sparks

from The Collaborative International Dictionary of English v.0.48

Spark coil \Spark coil\ (Elec.)
   (a) An induction coil used for producing sparks, esp. in an
       internal-combustion engine, wireless telegraph apparatus,
       etc.
   (b) A self-induction coil used to increase the spark in an
       electric gas-lighting apparatus.
       [Webster 1913 Suppl.]