hydrothermal
adjective
hy·dro·ther·mal
ˌhī-drə-ˈthər-məl 
: of or relating to hot water
—used especially of the formation of minerals by hot solutions rising from a cooling magma
Examples of hydrothermal in a Sentence
Recent Examples on the Web
The study also challenges long-standing assumptions about how quickly hydrothermal iron can reach the ocean surface.
—
New Atlas, 22 Jan. 2026
One of Yellowstone’s most active hydrothermal pools has exploded again, and the eruption was captured on video.
—Owen Clarke, Outside, 23 Dec. 2025
Spirit discovered evidence of ancient hydrothermal activity and hot springs on Mars.
—Atharva Gosavi, Interesting Engineering, 26 Nov. 2025
Circ’s hydrothermal technology can recycle each fiber, as well as any blend ratio of the two, known as polycotton blends.
—Diana Olick, CNBC, 24 Nov. 2025
See All Example Sentences for hydrothermal
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.
New Atlas, 22 Jan. 2026
One of Yellowstone’s most active hydrothermal pools has exploded again, and the eruption was captured on video.
—Owen Clarke, Outside, 23 Dec. 2025
Spirit discovered evidence of ancient hydrothermal activity and hot springs on Mars.
—Atharva Gosavi, Interesting Engineering, 26 Nov. 2025
Circ’s hydrothermal technology can recycle each fiber, as well as any blend ratio of the two, known as polycotton blends.
—Diana Olick, CNBC, 24 Nov. 2025
See All Example Sentences for hydrothermal
Cite this Entry
“Hydrothermal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrothermal. Accessed 1 Feb. 2026.
Copy CitationMedical Definition
Love words? Need even more definitions?
Merriam-Webster unabridged
