ˈdīnəˌmō noun
( -s )
Etymology: short for dynamo machine & dynamoelectric machine; translation of German dynamomaschine & dynamoelektrische maschine
1. : generator 3 ; especially : a direct-current generator
2. : an individual possessing great or unusual force or energy
this stubby dynamo of thirty-four organizes unions, writes poetry — George Weller