E region

noun

: the part of the ionosphere occurring between about 55 and 80 miles (90 and 130 kilometers) above the surface of the earth and containing the daytime E layer and the sporadic E layer

Word History

First Known Use

1930, in the meaning defined above

Time Traveler
The first known use of E region was in 1930

Dictionary Entries Near E region

Cite this Entry

“E region.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/E%20region. Accessed 13 Jun. 2024.

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