-
In hydraulics:
(noun)
-
A wheel moved by water, and employed to turn machinery.
(noun)
-
A wheel for raising water in large quantities, as the Persian wheel. See wheel.
(noun)
-
The paddle-wheel of a steamer.
(noun)
-
A water-wheel the gudgeons and bearings of which may be raised or lowered to adapt the wheel to various heights of water-supply.
(noun)
The Century Dictionary (Public Domain)