Ionosphere

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  ionosphere
       n : the outer region of the Earth's atmosphere; contains a high
           concentration of free electrons

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  45 Moby Thesaurus words for "ionosphere":
     Appleton layer, CAT, F layer, Heaviside-Kennelly layer,
     Van Allen belt, aerospace, aerosphere, air hole, air pocket,
     airspace, belt, bump, ceiling, chemosphere, crosswind, empty space,
     favorable wind, fog, front, head wind, high-pressure area, hole,
     isothermal region, jetstream, layer, low-pressure area,
     lower atmosphere, outer atmosphere, overcast, photosphere, pocket,
     roughness, soup, space, stratosphere, stratum, substratosphere,
     tail wind, tropopause, troposphere, trough, turbulence,
     upper atmosphere, visibility, visibility zero