penstock

/ˌpɛnˈstɑk/

Other forms: penstocks

Definitions of penstock

1. noun

   regulator consisting of a valve or gate that controls the rate of water flow through a sluice
   synonyms: floodgate, head gate, sluice valve, sluicegate, water gate

   type of:

   regulator

   any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.
2. noun

   conduit that carries a rapid flow of water controlled by a sluicegate
   synonyms: sluice, sluiceway

   type of:

   conduit

   a passage (a pipe or tunnel) through which water or electric wires can pass