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

Word History and Origins

Origin of ionopause¹

iono- + pause