[ plaz-muh-sfeer ]
/ ˈplæz məˌsfɪər /
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.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for plasmasphere
The plasmasphere of Eisberg differed from that of Earth in two ways.Unwise Child|Gordon Randall Garrett