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ozone layer
noun
: an atmospheric layer at heights of about 20 to 30 miles (32 to 48 kilometers) that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere
Examples of ozone layer in a Sentence
Recent Examples on the Web
Scientists project that if current trends continue, the ozone layer could fully recover by 2066, marking a significant triumph of international environmental cooperation and scientific innovation.
—Tom Howarth
follow, Newsweek, 1 Nov. 2024
The missing ozone layer and magnetic field means ultraviolet radiation from the Sun is about 30% stronger than on Earth, sterilizing those dusty red rocks.
—Michael Irving, New Atlas, 17 Oct. 2024
Researchers at the University of Southern California released a study saying that satellites are significantly damaging Earth's ozone layer.
—Brandi D. Addison, Austin American-Statesman, 28 June 2024
Ozone: Ozone absorbs UV radiation and helps keep the rays from reaching the surface, but if the ozone layer has been depleted, more UV radiation is getting to Earth.
—Sherri Gordon, Health, 16 Aug. 2024
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Word History
First Known Use
1927, in the meaning defined above
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Cite this Entry
“Ozone layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone%20layer. Accessed 30 Dec. 2024.
Kids Definition
ozone layer
noun
: a layer of the earth's atmosphere at heights of about 20 to 30 miles (32 to 48 kilometers) that is normally characterized by high ozone content which blocks most of the sun's ultraviolet radiation from entry into the lower atmosphere
More from Merriam-Webster on ozone layer
Britannica.com: Encyclopedia article about ozone layer
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