British Dictionary definitions for E region
a region of the ionosphere, extending from a height of 90 to about 150 kilometres. It reflects radio waves of medium wavelength: Also 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
Scientific definitions for E region
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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