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

Example Sentences

Recent Examples on the Web Yellowstone National Park, an almost mystical 2.2-million acre wonderland of dynamic hydrothermal activity, breathtaking scenery and spectacular wildlife, was established on this day in history, March 1, 1872. Kerry J. Byrne, Fox News, 1 Mar. 2023 The ground around hydrothermal areas of the park is thin and fragile, and scalding water lies just below the surface. Gregory Yeestaff Writer, Los Angeles Times, 17 Nov. 2022 The impeccable source on that is Robert Smith, a University of Utah professor emeritus who has studied the Yellowstone volcanic and hydrothermal system for 66 years and is known as Mr. Yellowstone. Joel Achenbach, Washington Post, 7 Nov. 2022 Nematova, now an 18-year-old graduating senior, was one of several students who worked together to create a hydrothermal hat that can help prevent heat stroke. Katie Reilly, Time, 8 June 2022 While there is no disputing the popularity of Yellowstone National Park as a destination known for its hydrothermal attractions, the park is also an incredible wildflower destination. J.d. Simkins, Sunset Magazine, 26 Apr. 2022 Yellowstone contains the densest concentration of active geysers in the world in one of the most extensive hydrothermal systems. Lauret Savoy, Condé Nast Traveler, 1 Mar. 2022 Cassini detected methane, which suggests ecosystems—possibly around hydrothermal vents. Jamie Carter, Forbes, 9 Jan. 2023 This might indicate that Europa’s ocean is more like Earth’s or Enceladus’ oceans than previously thought, and bolsters some theories about hydrothermal activity on the moon. Korey Haynes, Discover Magazine, 12 June 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrothermal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


International Scientific Vocabulary

First Known Use

1849, in the meaning defined above

Time Traveler
The first known use of hydrothermal was in 1849

Dictionary Entries Near hydrothermal

Cite this Entry

“Hydrothermal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrothermal. Accessed 22 Mar. 2023.

Medical Definition


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