'Spark coil' definitions:

Definition of 'spark coil'

From: WordNet
noun
An induction coil used to create sparks

Definition of 'Spark coil'

From: GCIDE
  • 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.]