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i·on·o·sphere
 ionosphere
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- pronunciation:
- aI
a
n
sfir
- features:
- Word Combinations (noun), Word Parts
| part of speech: |
noun |
| definition: |
layers of the earth's atmosphere located above the stratosphere from about thirty to two hundred and fifty miles above the earth's surface, and composed of rarefied gases that have been ionized by radiation from the sun.
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| derivation: |
ionospheric (adj.) |
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