the region of the ionosphere in which the E layer forms.
Origin of E region
First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a region of the ionosphere, extending from a height of 90 to about 150 kilometres. It reflects radio waves of medium wavelengthAlso called: Heaviside layer, Kennelly-Heaviside layer See also ionosphere
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The region of the ionosphere that lies approximately 90 to 150 km (56 to 93 mi) above the Earth's surface. This region may affect long-distance communications because it influences radio waves in the 1-3 megahertz range. Also called E layer Heaviside layer Compare D region F region.
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