ClipArt ETC
Any wheel for propelling machinery or other purpose, that is made to rotate by the direct action of water.

Water-wheel

Any wheel for propelling machinery or other purpose, that is made to rotate by the direct action of…

"A wheel driven by water shot over the top. The buckets of the wheel receive the water as nearly as possible at the top, and retain it until they approach the lowest point of the decent. The water acts principally by its gravity, though some effect is of course due to the velocity with which it arrives." — Winston's Encyclopedia, 1919

Water-wheel

"A wheel driven by water shot over the top. The buckets of the wheel receive the water as nearly as…