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amplidyne

[am-pli-dahyn]
noun Electricity.
  1. a direct-current generator with a rotating armature, capable of magnifying a small amount of power supplied to the field winding of the device and using the amplified power to operate an attached, direct-current motor.
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Origin of amplidyne

First recorded in 1935–40; ampli(fier) + dyne
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018