the lowest area of the ionosphere, having increased ion density and existing only in the daytime: it begins at an altitude of about 70 km (c. 43 mi) and merges with the E layer
D layer
D layerWebster's New World College Dictionary, Fifth Edition Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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"D layer." YourDictionary, n.d. Web. 18 December 2018. <https://www.yourdictionary.com/d-layer>.
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D layer. (n.d.). Retrieved December 18th, 2018, from https://www.yourdictionary.com/d-layer
D layer
noun
The lowest region of the ionosphere, existing only during the day and extending from about 40 to 65 kilometers (25 to 40 miles) above the earth. Also called D region .
THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Cite this page
MLA Style
"D layer." YourDictionary, n.d. Web. 18 December 2018. <https://www.yourdictionary.com/d-layer>.
APA Style
D layer. (n.d.). Retrieved December 18th, 2018, from https://www.yourdictionary.com/d-layer
