E layer

noun

: a layer of the ionosphere occurring about 65 miles (110 kilometers) above the earth's surface during daylight hours that is capable of reflecting shortwave frequencies

Examples of E layer in a Sentence

Recent Examples on the Web

The team’s radar detectors were designed to measure the waves bouncing off the ionosphere’s E layer, a region 100 kilometers up. —Byjonathan O’Callaghan, science.org, 12 May 2023

Word History

First Known Use

1933, in the meaning defined above

Kids Definition

E layer

noun

: a layer of the ionosphere that occurs at about 65 miles (110 kilometers) above the earth's surface during daylight hours and is capable of reflecting radio waves