heaviside layer

Noun
  1. A region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length (synset 108600141)
    is an instance of: part, region - the extended spatial location of something
    is a part of: ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons
    same as: e layer, e region, kennelly-heaviside layer

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