a region of cool plasma surrounding the earth, extending 8000–25,000 miles (13,000–40,000 km) into space, and bounded by the plasmapause.
Origin of plasmasphere
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for plasmasphere
Historical Examples of plasmasphere
The plasmasphere of Eisberg differed from that of Earth in two ways.Unwise Child
Gordon Randall Garrett