'Dynamo' definitions:

Definition of 'dynamo'

From: WordNet
noun
Generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature

Definition of 'Dynamo'

From: GCIDE
  • Dynamo \Dy"na*mo\, n. A dynamo-electric machine. [1913 Webster]