1. ionosphere

noun. (ˌaɪˈɑːnɔsˌfiːr) The outer region of the Earth's atmosphere; contains a high concentration of free electrons.
Synonyms
region E region D-layer E layer air atmosphere part F layer Heaviside layer D region Kennelly-Heaviside layer Appleton layer F region
Antonyms
inside outside wet cyclone anticyclone
Etymology
ionosphere (English)
-sphere (English)
iono- (English)
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