'magneto' definitions:

Definition of 'magneto'

(from WordNet)
noun
A small dynamo with a secondary winding that produces a high voltage enabling a spark to jump between the poles of a spark plug in a gasoline engine [syn: magneto, magnetoelectric machine]

Definition of 'magneto'

From: GCIDE
  • magneto \mag*ne"to\ (m[a^]g*n[=e]"t[-o]), n. A small electric generator with an armature rotating in a magnetic field, having a secondary winding that generates a high voltage, such as one used to generate a voltage sufficient to cause a spark to jump between the poles of a spark plug in an internal-combustion engine. [WordNet 1.5]