ionosphere

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Noun ionosphere has 1 sense

ionosphere - the outer region of the Earth's atmosphere; contains a high concentration of free electrons
--₁ is a kind of region, part
--₁ is a part of atmosphere, air
--₁ has parts:
D-layer, D region; Appleton layer, F layer, F region; Heaviside layer, Kennelly-Heaviside layer, E layer, E region