Ionosphere

noun

Word Frequency: 0.6

Definitions

1.nounThe 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.nounThe similar region of the atmosphere of another planet.

Synonyms

magnetosphere nightside dayside waveguide topside ionopause homosphere exosphere ignorosphere ozonosphere troposphere surface boundary layer

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