hy·dro
ˈhī-(ˌ)drō 
plural hydros
British
: an establishment offering hydropathic treatment (as for weight loss) : health spa
Examples of hydro in a Sentence
Recent Examples on the Web
Sacramento Bee Staff, Sacbee.com, 8 Jan. 2026
The company now provides hydro jetting, sewer repair and replacement, trenchless repairs, water damage cleanup services, and water filtration and softening systems.
—Alexander Coolidge, Cincinnati Enquirer, 7 Jan. 2026
The collaboration focuses on utilizing the proprietary hydro-metallurgical technology developed by IonicRE’s subsidiary, Ionic Technologies, which is designed to extract and refine rare earth elements from end-of-life permanent magnets.
—Aman Tripathi, Interesting Engineering, 3 Jan. 2026
The tried-and-true grid-scale storage option—pumped hydro, in which water is pumped between reservoirs at different elevations—lasts for decades and can store thousands of megawatts for days.
—IEEE Spectrum, 21 Dec. 2025
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Noun
Today, two-thirds of our energy comes from clean sources, such as solar, hydro, wind, geothermal, and nuclear power.
—Sacramento Bee Staff, Sacbee.com, 8 Jan. 2026
The company now provides hydro jetting, sewer repair and replacement, trenchless repairs, water damage cleanup services, and water filtration and softening systems.
—Alexander Coolidge, Cincinnati Enquirer, 7 Jan. 2026
The collaboration focuses on utilizing the proprietary hydro-metallurgical technology developed by IonicRE’s subsidiary, Ionic Technologies, which is designed to extract and refine rare earth elements from end-of-life permanent magnets.
—Aman Tripathi, Interesting Engineering, 3 Jan. 2026
The tried-and-true grid-scale storage option—pumped hydro, in which water is pumped between reservoirs at different elevations—lasts for decades and can store thousands of megawatts for days.
—IEEE Spectrum, 21 Dec. 2025
See All Example Sentences for hydro
Cite this Entry
“Hydro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydro. Accessed 9 Jan. 2026.
Copy CitationMedical Definition
hydro
noun
hy·dro
ˈhī-(ˌ)drō
plural hydros
British
: a hydropathic facility : spa
also
: a hotel catering to people using such a facility
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