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Ionosphere
The part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more.
📖 Definitions of "Ionosphere"
noun
- 1
The part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more.
- 2
The similar region of the atmosphere of another planet.
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