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1. (n.) ionosphere
the region of the earth's atmosphere between the stratosphere and the exosphere, consisting of several ionized layers and extending from about 50 to 250 mi. (80 to 400 km) above the surface of the earth.
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| Definition of 'ionosphere' |
Princeton's WordNet |
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1. (noun) ionosphere
the outer region of the Earth's atmosphere; contains a high concentration of free electrons
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| Definition of 'ionosphere' |
Dictionary of Military and Associated Terms |
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1. ionosphere
That part of the atmosphere, extending from about 70 to 500 kilometers, in which ions and free electrons exist in sufficient quantities to reflect electromagnetic waves.
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