Etymology
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ionosphere (n.)

region of the outer atmosphere, 1926, from ion + sphere. Coined by Scottish radar pioneer Robert A. Watson-Watt (1892-1973). So called because it contains many ions.

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Definitions of ionosphere

ionosphere (n.)
the outer region of the Earth's atmosphere; contains a high concentration of free electrons;
From wordnet.princeton.edu

Dictionary entries near ionosphere

Ionian

Ionic

ionic

ionization

ionize

ionosphere

iopterous

iota

IOU

Iowa

IPA