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ionopause

[ ahy-on-uh-pawz ]

noun

  1. the transitional zone between the ionosphere and the mesosphere.


ionopause

/ aɪˈɒnəˌpɔːz /

noun

  1. the transitional zone in the atmosphere between the ionosphere and the exosphere, about 644 km (400 miles) from the earth's surface


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tortuous

[tawr-choo-uhs ]

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