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
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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 See all Example Sentences for ozone layer 

Word History

First Known Use

1927, in the meaning defined above

Time Traveler
The first known use of ozone layer was in 1927

Dictionary Entries Near ozone layer

Cite this Entry

“Ozone layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone%20layer. Accessed 28 Nov. 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

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