English Explanatory Dictionary

ionosphere

English dictionary entry

Meanings

noun
  1. The 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. The similar region of the atmosphere of another planet.

Pronunciation

LL-Q1860 (eng)-Rho9998-ionosphere.wav

Word forms

ionosphere ionospheres

Etymology

From iono- + -sphere.

Related words

ionospheric ionospherically ionospherist
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