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ozone layer

noun
1.
Meteorology. the layer of the upper atmosphere where most atmospheric ozone is concentrated, from about 8 to 30 miles (12 to 48 km) above the earth, with the maximum ozone concentration occurring at an altitude of about 12 miles (19 km).
Also called ozonosphere
[oh-zoh-nuh-sfeer] /oʊˈzoʊ nəˌsfɪər/ (Show IPA)
.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ozonosphere

ozonosphere

/əʊˈzəʊnəˌsfɪə; -ˈzɒnə-/
noun
1.
another name for ozone layer

ozone layer

noun
1.
the region of the stratosphere with the highest concentration of ozone molecules, which by absorbing high-energy solar ultraviolet radiation protects organisms on earth Also called ozonosphere
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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ozonosphere in Science
ozone layer  
A region of the upper atmosphere containing relatively high levels of ozone, located mostly within the stratosphere, with the greatest concentrations occurring from about 15 to 30 km (10 to 19 mi) above the Earth's surface. The ozone absorbs large amounts of solar ultraviolet radiation, preventing it from reaching the Earth's surface. The concentration of ozone in the ozone layer is usually under 10 parts per million. Also called ozonosphere. See Note at ozone.
ozonosphere
  (ō-zō'nə-sfîr')   
See ozone layer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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ozonosphere in Culture

ozone layer definition


A band of ozone in the upper atmosphere. Ozone is a molecule made of three atoms of oxygen instead of the usual two.

Note: The ozone layer absorbs harmful ultraviolet radiation from the sun and is thus very important to the health of human beings and other life forms on Earth. The Earth's ozone layer could be at risk because of the action of chlorofluorocarbons, but international treaties have banned the production of these chemicals. The ozone layer is expected to return to normal in a few decades. (See ozone hole.)
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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