waterwheel


wa·ter·wheel

noun \-ˌhwēl, -ˌwēl\

: a usually large wooden or metal wheel that is turned by the force of water flowing against it

Full Definition of WATERWHEEL

1
:  a wheel made to rotate by direct action of water
2
:  a wheel for raising water

Illustration of WATERWHEEL

First Known Use of WATERWHEEL

15th century

waterwheel

noun    (Concise Encyclopedia)

Machine for tapping the energy of running or falling water (hence a prime mover) by means of a set of paddles or buckets mounted around a wheel. The force of the moving water against the paddles, or the weight of water poured into the buckets, rotates the wheel. The resulting power is transmitted to machinery via the shaft of the wheel. The waterwheel was perhaps the earliest source of mechanical energy to replace that of humans and animals, and it was first used for such tasks as raising water and grinding grain. See also waterpower.

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