Heaviside layer definitions

Heaviside layer

The ionosphere
Found on http://jot101.com/2015/05/a-z-of-science-fiction-words/

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Heaviside layer

[n] - a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
Found on http://www.webdictionary.co.uk/definition.php?query=Heaviside%20layer

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Heaviside layer

Kennelly-Heaviside layer noun a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
Found on https://www.encyclo.co.uk/local/20974

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