a belt of ionized hydrogen surrounding the earth at the outer limit of the exosphere.

Nearby words

  1. geochemistry,
  2. geochronology,
  3. geochronometry,
  4. geocline,
  5. geocode,
  6. geod.,
  7. geode,
  8. geodemographics,
  9. geodesic,
  10. geodesic dome

Origin of geocorona

First recorded in 1955–60; geo- + corona

Related formsge·o·co·ro·nal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for geocorona



The halo of far-ultraviolet solar light that reflects off the Earth's exosphere.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.