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

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

geocorona in Science



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.