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hydroelectric

American  
[hahy-droh-i-lek-trik] / ˌhaɪ droʊ ɪˈlɛk trɪk /

adjective

  1. pertaining to the generation and distribution of electricity derived from the energy of falling water or any other hydraulic source.


hydroelectric British  
/ ˌhaɪdrəʊɪlɛkˈtrɪsɪtɪ, -ˌiːlɛk-, ˌhaɪdrəʊɪˈlɛktrɪk /

adjective

  1. generated by the pressure of falling water

    hydroelectric power

  2. of or concerned with the generation of electricity by water pressure

    a hydroelectric scheme

"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

Other Word Forms

Etymology

Origin of hydroelectric

First recorded in 1825–35; hydro- 1 + electric

Vocabulary lists containing hydroelectric

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Kern River No. 3 Hydroelectric Project has a generating capacity of 40.2 megawatts, enough to supply approximately 48,000 homes.

From Los Angeles Times • Jul. 6, 2025

Seattle City Light’s Skagit Hydroelectric Project, and its ongoing federal re-licensing effort, stands to deeply impact those of us who fish, farm, work and live in the Skagit, for the next half century and beyond.

From Seattle Times • Jun. 8, 2023

Hydroelectric plants and other reservoirs aren't currently included in that list.

From Salon • Mar. 25, 2023

The dam’s operators filed an application to surrender the Lower Klamath Hydroelectric Project on Nov. 17, 2020.

From Washington Times • Aug. 27, 2022

Hydroelectric capacity development had been relatively more rapid, with a sixfold increase during the decade.

From Area Handbook for Romania by Bernier, Donald W.