water-wheel

waterwheel

[waw-ter-hweel, -weel, wot-er-]
noun
1.
a wheel or turbine turned by the weight or momentum of water and used to operate machinery.
2.
a wheel with buckets for raising or drawing water, as a noria.
3.
the paddle wheel of a steamboat.
Also, water wheel.


Origin:
1375–1425; late Middle English; see water, wheel

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
waterwheel

noun
1. a wheel with buckets attached to its rim; raises water from a stream or pond 
2. a wheel that rotates by direct action of water; a simple turbine 
WordNet® 3.0, © 2006 by Princeton University.
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