watermill

Etymology

From water + mill.

noun

  1. A mill powered by water.; The machine or device itself.“Near-synonym: water engine”
  2. A mill powered by water.; The machine and the building that houses it, considered as a unit.“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.”