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English definition of “the ionosphere”

the ionosphere

noun [S] uk   /aɪˈɒn.əˌsfɪər/ us    /-ˈɑːn.əˌsfɪr/ specialized
part of the Earth's atmosphere, from about 60 kilometres to about 1,000 kilometres above the surface, in which there are many ions The Earth and outer space - general words
ionospheric
adjective uk   /aɪˌɒ.nəˈsfer.ɪk/ us    /-ˌɑːn.ə-/
The Earth and outer space - general words
(Definition of the ionosphere from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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