mesosphere
noun
me·so·sphere
ˈme-zə-ˌsfir 
ˈmē-,
-sə-
: the part of the earth's atmosphere between the stratosphere and the thermosphere in which temperature decreases with altitude to the atmosphere's absolute minimum
Examples of mesosphere in a Sentence
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Alongside other processes, this cools the mesosphere to temperatures as low as minus 210 degrees Fahrenheit, according to EarthSky.
—
Margherita Bassi, Smithsonian Magazine, 30 May 2025
These rare clouds form roughly 50 miles (80 kilometers) above Earth in the mesosphere, a cold layer of the atmosphere located about 43 miles (70 km) above where ordinary clouds form.
—Anthony Wood, Space.com, 28 May 2025
Flashing through the sky, these red sprites, or red lightning streaks, arise when a sudden flow of electricity shoots through the mesosphere, around 30 miles to 50 miles above Earth.
—Sam Walters, Discover Magazine, 19 Mar. 2025
The Soviet rockets actually went beyond the stratosphere to another layer, called the mesosphere, where meteors falling toward Earth burn into shooting stars.
—Carl Zimmer, Smithsonian Magazine, 25 Feb. 2025
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Margherita Bassi, Smithsonian Magazine, 30 May 2025
These rare clouds form roughly 50 miles (80 kilometers) above Earth in the mesosphere, a cold layer of the atmosphere located about 43 miles (70 km) above where ordinary clouds form.
—Anthony Wood, Space.com, 28 May 2025
Flashing through the sky, these red sprites, or red lightning streaks, arise when a sudden flow of electricity shoots through the mesosphere, around 30 miles to 50 miles above Earth.
—Sam Walters, Discover Magazine, 19 Mar. 2025
The Soviet rockets actually went beyond the stratosphere to another layer, called the mesosphere, where meteors falling toward Earth burn into shooting stars.
—Carl Zimmer, Smithsonian Magazine, 25 Feb. 2025
See All Example Sentences for mesosphere
Cite this Entry
“Mesosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mesosphere. Accessed 10 Jun. 2025.
Copy CitationKids Definition
mesosphere
noun
me·so·sphere
ˈmez-ə-ˌsfi(ə)r
ˈmēz-,
ˈmēs-,
ˈmes-
: a layer of the atmosphere extending from the top of the stratosphere to an altitude of about 50 miles (80 kilometers)
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