Definition of waterwheel noun from the Oxford Advanced American Dictionary

 

waterwheel

 noun
noun
NAmE//ˈwɔt̮ərˌwil//
 
, NAmE//ˈwɑt̮ərˌwil//
 
 
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a wheel turned by the movement of water, used, especially in the past, to drive machinery
See the Oxford Advanced Learner's Dictionary entry: waterwheel