F1 layer

noun

: the lower of the two layers into which the F region of the ionosphere splits in the daytime that occurs at varying heights from about 80 to 120 miles (130 to 200 kilometers) above the earth's surface

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Word History

First Known Use

1933, in the meaning defined above

Time Traveler
The first known use of F1 layer was in 1933

Dictionary Entries Near F1 layer

f

F1 layer

F2F

Cite this Entry

“F1 layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/F1%20layer. Accessed 19 Aug. 2022.

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