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


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

Nearby words

  1. hydrodiuril,
  2. hydrodynamic,
  3. hydrodynamicist,
  4. hydrodynamics,
  5. hydroelastic suspension,
  6. hydroelectricity,
  7. hydroencephalocele,
  8. hydrofluoric,
  9. hydrofluoric acid,
  10. hydrofluorocarbon

Origin of hydroelectric

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

Related formshy·dro·e·lec·tric·i·ty [hahy-droh-i-lek-tris-i-tee, -ee-lek-] /ˌhaɪ droʊ ɪ lɛkˈtrɪs ɪ ti, -ˌi lɛk-/, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hydroelectric

British Dictionary definitions for hydroelectric


/ (ˌhaɪdrəʊɪˈlɛktrɪk) /


generated by the pressure of falling waterhydroelectric power
of or concerned with the generation of electricity by water pressurea hydroelectric scheme
Derived Formshydroelectricity (ˌhaɪdrəʊɪlɛkˈtrɪsɪtɪ, -ˌiːlɛk-), noun

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

Word Origin and History for hydroelectric



1827, formed in English from hydro- + electric. Related: Hydroelectricity.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for hydroelectric


[ hī′drō-ĭ-lĕktrĭk ]

Using the power of water currents to generate electric power. Generally, hydroelectric power is created by directing water flow through a turbine, where the water causes fans to turn, creating the torque needed to drive an electric generator.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.