hydrothermal

adjective

hy·​dro·​ther·​mal ˌhī-drə-ˈthər-məl How to pronounce hydrothermal (audio)
: of or relating to hot water
used especially of the formation of minerals by hot solutions rising from a cooling magma
hydrothermally adverb

Examples of hydrothermal in a Sentence

Recent Examples on the Web
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The drying stage was entirely eliminated by using hydrothermal carbonization — a process similar to high-pressure cooking. Mrigakshi Dixit, Interesting Engineering, 25 Mar. 2026 Yellowstone National Park was established in 1872 to preserve access to its unique geologic and hydrothermal features, like the geyser Old Faithful. Zach Wichter, USA Today, 5 Mar. 2026 The resort’s Bathhouse centers on a hydrothermal contrast circuit that pairs heat therapies with seawater immersion, allowing guests to alternate between warm and cool environments designed to stimulate circulation and reset the nervous system. Jill Schildhouse, Forbes.com, 19 Feb. 2026 One of the most unique geological features of the region, the Dallol hydrothermal field creates an otherworldly landscape that travelers brave the long drive and excruciating heat to see. Elizabeth Rhodes, Travel + Leisure, 17 Feb. 2026 See All Example Sentences for hydrothermal

Word History

Etymology

International Scientific Vocabulary

First Known Use

1849, in the meaning defined above

Time Traveler
The first known use of hydrothermal was in 1849

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Cite this Entry

“Hydrothermal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrothermal. Accessed 2 Apr. 2026.

Medical Definition

hydrothermal

adjective
hy·​dro·​ther·​mal ˌhī-drə-ˈthər-məl How to pronounce hydrothermal (audio)
: of or relating to hot water
hydrothermally adverb
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