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ionopause

[ahy-on-uh-pawz] /aɪˈɒn əˌpɔz/
noun
1.
the transitional zone between the ionosphere and the mesosphere.
Origin of ionopause
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for ionopause

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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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