noun, plural dy·na·mos.

  1. an electric generator, especially for direct current.
  2. an energetic, hardworking, forceful person.

  1. variant of dyna-: dynamometer.

noun plural -mos

  1. a device for converting mechanical energy into electrical energy, esp one that produces direct currentCompare generator (def. 1)
  2. informal an energetic hard-working person

combining form

  1. indicating powerdynamoelectric; dynamite

1882, short for dynamo-machine, from German dynamoelektrischemaschine “dynamo-electric machine,” coined 1867 by its inventor, German electrical engineer Werner Siemans (1816-1892), from Greek dynamis “power.”


  1. Force; energy:dynamogenesis.

  1. An electric generator, especially one that produces direct current. See more at generator.
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