D layer


: a layer within the D region of the ionosphere
also : d region

Word History

First Known Use

circa 1934, in the meaning defined above

Time Traveler
The first known use of D layer was circa 1934

Dictionary Entries Near D layer

Cite this Entry

“D layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/D%20layer. Accessed 19 May. 2024.

Kids Definition

D layer

: a layer or region of the lower ionosphere
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