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water vapor
noun
: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)
Examples of water vapor in a Sentence
Recent Examples on the Web
Primary hazards include high levels of volcanic gases—predominantly water vapor (H2O), carbon dioxide (CO2), and sulfur dioxide (SO2).
—Josh Hammer, Newsweek, 23 Dec. 2024
The crux of the idea is to use future space- and ground-based telescopes, hopefully as soon as next decade, to take high resolution spectra of water vapor in an extrasolar earth’s atmosphere.
—Bruce Dorminey, Forbes, 13 Dec. 2024
In contrast, Earth’s volcanic eruptions are over 60 percent water vapor.
—Margherita Bassi, Smithsonian Magazine, 5 Dec. 2024
Warmer atmospheres can hold more water vapor before releasing the water as rain or snow.
—Elise Schmelzer The Denver Post (tns), arkansasonline.com, 25 Nov. 2024
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Word History
First Known Use
15th century, in the meaning defined above
Time Traveler
The first known use of water vapor was
in the 15th century
Dictionary Entries Near water vapor
Cite this Entry
“Water vapor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20vapor. Accessed 3 Jan. 2025.
Kids Definition
water vapor
noun
: water in a gaseous form especially when below boiling temperature and spread through the atmosphere
Medical Definition
water vapor
noun
: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)
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