penstock
pens·tock
noun
2.
conduit that carries a rapid flow of water controlled by a sluicegate
Origin
Perhaps from pen (“an enclosure”) + stock.
Related words
Word family
Parts
Part of
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.