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
ˌhī-drə-ˈthər-mə-lē How to pronounce hydrothermal (audio)
adverb

Examples of hydrothermal in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Some of the amenities include a yoga room with classes available to guests throughout the week (except Sundays), a 24-hour gym, and a spa equipped with a sauna, cold plunge, and hydrothermal circuit. — Nikkita Nair, Condé Nast Traveler, 7 Oct. 2026 Microbes have only been found to colonize eight of the 70 underwater impact craters with hydrothermal activity. — Elizabeth Rayne, ArsTechnica, 30 Sep. 2026 Circ’s hydrothermal recycling process is designed to separate polyester and cellulose in blended textiles without sacrificing either component. — Alexandra Harrell, Footwear News, 26 Aug. 2026 In addition to the massage rooms, yoga pavilion, and infinity pool, there will be a hydrothermal center with a hammam, infrared sauna, and sensory-deprivation hut. — Mark Johansen, Travel + Leisure, 16 Aug. 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

Phrases Containing hydrothermal

Rhymes for hydrothermal

See All Rhymes for hydrothermal

Browse Nearby Words

hydrotherapy
hydrothermal
hydrothermal vent
See all Nearby Words

Cite this Entry

“Hydrothermal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrothermal. Accessed 14 Oct. 2026.

Copy Citation

Medical Definition

hydrothermal

adjective
hy·​dro·​ther·​mal ˌhī-drə-ˈthər-məl How to pronounce hydrothermal (audio)
: of or relating to hot water
hydrothermally
-mə-lē How to pronounce hydrothermal (audio)
adverb
Love words? Need even more definitions?

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

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of deportment

See Definitions and Examples »

Popular in Grammar & Usage

See More

Do You Need a New Language Peeve?

The Exceptions of '-s' and '-es' Plurals

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

What's the difference between 'fascism' and 'socialism'?
See More

Popular in Wordplay

See More

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't

7 Words for Bad Endings and Rough Situations

The Words of the Week - Oct. 9

Why do we call it a 'flea market'?
See More

Popular

See More

Do You Need a New Language Peeve?

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
a cup of tea and a golf ball on tee side by side
Quiz: Sounds Like... Choose the word that sounds like it fits the clue...
See All