water wheel

  1. a wheel turned by water running against or falling on paddles, used as a source of power
  2. a wheel with buckets on its rim, used for lifting water

See water wheel in American Heritage Dictionary 4

also wa·ter·wheel

noun
  1. A wheel propelled by falling or running water and used to power machinery.
  2. A wheel with buckets attached to its rim for raising water.

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water wheel

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