The Collaborative International Dictionary of English v.0.48:

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

WordNet (r) 3.0 (2006):

dynamo
    n 1: 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

The Free On-line Dictionary of Computing (30 December 2018):

DYNAMO

   DYNamic MOdels.  A language for continuous simulation
   including economic, industrial and social systems, developed
   by Phyllis Fox and A.L. Pugh in 1959.

   Versions include DYNAMO II, DYNAMO II/370, DYNAMO II/F, DYNAMO
   III and Gaming DYNAMO.

   ["DYNAMO User's Manual", A.L. Pugh, MIT Press 1976].