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Word of the Day Friday, June 12, 2026

penstock

/ˈpɛnstɒk/ noun · British & US
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What does penstock mean?

A penstock is a pipe or conduit that carries water from a reservoir or canal to a waterwheel or turbine. It is a critical component of hydroelectric power plants and waterwheels, allowing for the efficient transfer of water and the generation of electricity. The penstock is designed to withstand the pressure of the water flowing through it, and its construction and maintenance are crucial to the operation of these systems. In addition to its use in hydroelectric power plants, the penstock is also used in other applications, such as irrigation systems and water supply networks. Overall, the penstock is an important technical term that plays a vital role in the generation of electricity and the management of water resources.

noun

A penstock is a pipe or conduit that carries water from a reservoir or canal to a waterwheel or turbine, typically in a hydroelectric power plant or a mill.

Senses
  1. A pipe or conduit that carries water from a reservoir or canal to a waterwheel or turbine.
Example

"The penstock was designed to withstand the pressure of the water flowing through it."

More examples

"The penstock was designed to withstand the pressure of the water flowing through it."

"The hydroelectric power plant used a penstock to channel water from the reservoir to the turbine."

Plural penstocks

The plural form 'penstocks' is used when referring to multiple penstocks.

Example

"The hydroelectric power plant had several penstocks that carried water from the reservoir to the turbine."

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymology of penstock

The word 'penstock' is derived from the Old English words 'pen' and 'stock', meaning 'pipe' and 'wood' respectively. It is believed to have originated in the 14th century, when waterwheels and mills were first used to harness the power of water.

Usage notes

Penstock is a technical term used in the context of hydroelectric power plants and waterwheels. It is not commonly used in everyday conversation.

Synonyms for penstock

Rhymes with penstock