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d-layer

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D layer

 
Use d-layer in a Sentence
–noun
the lowest region of the ionosphere, characterized by mounting electron and ion density: exists, during the day only, from about 43 to 50 mi. (70 to 80 km) altitude.
Compare D region.

Origin:
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Records: D Layer
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Science Dictionary
D layer  
See D region.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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