Found 2 items, similar to ionosphere.
English → English (WordNet)
Definition: ionosphere
ionosphere
n : the outer region of the Earth's atmosphere; contains a high
concentration of free electrons
English → English (gcide)
Definition: ionosphere
ionosphere
\ionosphere\ n.
the outer region of the earth's atmosphere, beyond which is
the
exosphere; it contains a high concentration of free
electrons and ions, and extends from about 50 miles to about
250 miles above the earth's surface, but the height shows
daily and seasonal variation, and the composition of the
particles in the ionosphere is also affected by events such
as solar flares.
[WordNet 1.5 +PJC]