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Meaning of flywheel

fly•wheel

Pronunciation: (flī'hwēl", -wēl"), [key]
— n. Mach.
  1. a heavy disk or wheel rotating on a shaft so that its momentum gives almost uniform rotational speed to the shaft and to all connected machinery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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