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

Before she was brought onto the plane, Scofield said, the research was used to locate and measure a hole in the earth’s ozone layer in the 1980s, finding where chlorofluorocarbons — chemicals commonly used as refrigerants — were destroying ozone in the atmosphere. —Nollyanne Delacruz, The Mercury News, 15 May 2024

The ozone layer is a thin blanket in the stratosphere made of molecules with three oxygen atoms. —Will Sullivan, Smithsonian Magazine, 2 May 2024

Word History

First Known Use

1927, in the meaning defined above

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