hydroelectric

adjective

hy·​dro·​elec·​tric ˌhī-drō-i-ˈlek-trik How to pronounce hydroelectric (audio)
: of or relating to production of electricity by waterpower
constructed a hydroelectric power plant at the dam site
hydroelectrically adverb
hydroelectricity noun

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The prime component of most hydroelectric systems is a dam. A high dam funnels water downward at high pressure to spin turbines, which in turn drive generators to produce high-voltage electricity. Mountainous countries with rushing rivers can produce the most hydroelectricity. Though hydroelectricity comes from a clean and completely renewable energy source, dams disrupt natural systems in a way that disturbs environmentalists.

Examples of hydroelectric in a Sentence

Recent Examples on the Web
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Electricity is produced from solar energy, wind power, and the resort’s own hydroelectric plant. Jacqui Gifford, Travel + Leisure, 13 Mar. 2025 The resources sustainably produced by the country’s hydroelectric plants are often sold at a loss to neighboring countries, so Morphware has created a win-win scenario for itself and the local economy. Chris Gallagher, USA TODAY, 5 Mar. 2025 Democratic lawmakers confirmed to the outlet that the layoffs also impact workers at national laboratories, hydroelectric plants and Cold War-era nuclear sites. Hannah Parry, Newsweek, 14 Feb. 2025 Those efforts include hundreds of millions of dollars spent studying a hydroelectric dam that was never built and tens of millions building an Anchorage seafood plant that failed. ProPublica, 13 Feb. 2025 See All Example Sentences for hydroelectric

Word History

Etymology

International Scientific Vocabulary

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of hydroelectric was in 1884

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Cite this Entry

“Hydroelectric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydroelectric. Accessed 15 Apr. 2025.

Kids Definition

hydroelectric

adjective
hy·​dro·​elec·​tric ˌhī-drō-i-ˈlek-trik How to pronounce hydroelectric (audio)
: of or relating to production of electricity by waterpower
hydroelectricity noun

More from Merriam-Webster on hydroelectric

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