Wiktionary
n. A device that converts the energy of moving water, usually at a dam into rotary motion, usually used to make electricity.
Wikipedia
A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work.
Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now they are mostly used for electric power generation. Water turbines are mostly found in dams to generate electric power from water kinetic energy.
Usage examples of "water turbine".
Even with Yual's help and the softer-wrought bog iron, he had spent, on and off, most of the spring and early summer creating the pieces-those and the design for the small water turbine in which Yual had been so interested.
It may come from something simple, like an oil-fuelled dynamo or a solar panel or a water turbine.