penstock

pen·stock

P0170800 (pĕn′stŏk′)n.1. A sluice or gate used to control a flow of water.2. A pipe or conduit used to carry water to a water wheel or turbine.

penstock

(ˈpɛnˌstɒk) n1. (Mechanical Engineering) a conduit that supplies water to a hydroelectric power plant2. (Mechanical Engineering) a channel bringing water from the head gates to a water wheel3. (Mechanical Engineering) a sluice for controlling water flow[C17: from pen² + stock]

Thesaurus

Noun	1.	penstock - regulator consisting of a valve or gate that controls the rate of water flow through a sluicehead gate, sluice valve, sluicegate, water gate, floodgateregulator - any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.sluice, sluiceway, penstock - conduit that carries a rapid flow of water controlled by a sluicegate
	2.	penstock - conduit that carries a rapid flow of water controlled by a sluicegatesluice, sluicewayconduit - a passage (a pipe or tunnel) through which water or electric wires can pass; "the computers were connected through a system of conduits"head gate, penstock, sluice valve, sluicegate, water gate, floodgate - regulator consisting of a valve or gate that controls the rate of water flow through a sluice