turbine

noun

1. Any of various rotary machines that use the kinetic energy of a continuous stream of fluid (a liquid or a gas) to turn a shaft.

   “Upstream from the house is a watermill, cased in gleaming white weather-boarding, which has been restored to working order. Near by is the water-driven turbine which [Rudyard] Kipling had installed in 1902 to light his mansion with electricity.”

   “Turbines have been around for a long time—windmills and water wheels are early examples. The name comes from the Latin turbo, meaning vortex, and thus the defining property of a turbine is that a fluid or gas turns the blades of a rotor, which is attached to a shaft that can perform useful work.”