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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
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
The ozone layer is already fighting to recover from past damage caused by chlorofluorocarbons, chemicals that were commonly used in refrigeration, air conditioning, foam blowing and as propellants in aerosol sprays.
—Brandi D. Addison, Austin American-Statesman, 28 June 2024
The most successful global environmental treaty to date was the 1987 Montreal Protocol on Substances That Deplete the Ozone Layer, which protected the ozone layer by phasing out the production of chemicals responsible for its depletion.
—James A. Baker Iii, Foreign Affairs, 13 Apr. 2020
The ozone layer, a critical atmospheric shield, protects Earth from harmful ultraviolet radiation.
—Tom Howarth
follow, Newsweek, 1 Nov. 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 22 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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