[ pen-stok ]
/ ˈpɛnˌstɒk /


a pipe conducting water from a head gate to a waterwheel.
a conduit for conveying water to a power plant.
a sluicelike contrivance used to control the flow of water.

Origin of penstock

First recorded in 1600–10; pen2 + stock Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for penstock

British Dictionary definitions for penstock

/ (ˈpɛnˌstɒk) /


a conduit that supplies water to a hydroelectric power plant
a channel bringing water from the head gates to a water wheel
a sluice for controlling water flow

Word Origin for penstock

C17: from pen ² + stock
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for penstock

[ pĕnstŏk′ ]

A sluice or gate used to control a flow of water.
A pipe or conduit used to carry water to a water wheel or turbine.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.