E layer

American  

noun

1. the radio-reflective ionospheric layer of maximum electron density, normally found at an altitude between 60 and 75 miles (100 and 120 km).

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E layer British  

noun

1. another name for E region

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E layer Scientific  

1. See E region

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Etymology

Origin of E layer

First recorded in 1930–35

Example Sentences

The team’s radar detectors were designed to measure the waves bouncing off the ionosphere’s E layer, a region 100 kilometers up.

From Science Magazine • May 12, 2023