[hahy-druh-thur-muh l]

Origin of hydrothermal

First recorded in 1840–50; hydro-1 + thermal
Related formshy·dro·ther·mal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hydrothermal

Historical Examples of hydrothermal

British Dictionary definitions for hydrothermal


  1. of or relating to the action of water under conditions of high temperature, esp in forming rocks and minerals
Derived Formshydrothermally, adverb
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 hydrothermal

1852, from hydro- + thermal (adj.); 1855 in geology.

Online Etymology Dictionary, © 2010 Douglas Harper

hydrothermal in Science


  1. Relating to or produced by hot water, especially water heated underground by the Earth's internal heat.Hydrothermal energy is power that is generated using the Earth's hot water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.