geothermal

adjective

geo·​ther·​mal ˌjē-ō-ˈthər-məl How to pronounce geothermal (audio)
: of, relating to, or utilizing the heat of the earth's interior
also : produced or permeated by such heat
geothermal steam
geothermal regions
geothermally adverb

Did you know?

Geothermal comes partly from the Greek thermos, "hot". Most geothermal electricity is provided by power plants situated in areas where there is significant activity of the Earth's great tectonic plates—often the same areas where volcanoes are found. But hot water from deep underground may be used by cities far from volcanoes to heat buildings or sidewalks. And a newer source of geothermal energy relies on a less dramatic kind of heat: Individual homeowners can now install heat pumps that take advantage of the 50°-60° temperature of the soil near the surface to provide heating in cold weather (and air-conditioning in the warm months). These very small-scale geothermal systems may eventually supply more useful energy than the large power plants.

Examples of geothermal in a Sentence

Recent Examples on the Web The Icelandic company harvests salt from the Westfjords using a sustainable geothermal process, and the substantial, crystalline pyramids carry heft and flavor. Stephanie Breijo, Los Angeles Times, 2 June 2024 The practice has also been employed in Asia since at least the sixth century A.D., when nomadic Buddhists are said to have brought the concept of onsen (inns and bathhouses built around natural geothermal pools) to Japan from the Korean Peninsula. Gisela Williams, New York Times, 28 May 2024 If that all sounds too active, opt for a soak at the historic Morton’s Warm Springs, another spot to enjoy the scenic Sonoma Creek, with geothermal pools heated to 84 to 94 degrees, depending on weather. Amber Turpin, The Mercury News, 27 May 2024 Today Boise leaders see their geothermal system as a key component to meeting the city's climate neutrality goals. Kirk Siegler, NPR, 8 May 2024 See all Example Sentences for geothermal 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'geothermal.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

geo- + thermal entry 1

First Known Use

1875, in the meaning defined above

Time Traveler
The first known use of geothermal was in 1875

Dictionary Entries Near geothermal

Cite this Entry

“Geothermal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geothermal. Accessed 6 Jun. 2024.

Kids Definition

geothermal

adjective
geo·​ther·​mal ˌjē-ō-ˈthər-məl How to pronounce geothermal (audio)
variants also geothermic
-mik
: of, relating to, or using the heat of the earth's interior
also : produced by such heat
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!