plasmasphere

[ plaz-muh-sfeer ]

noun

, Astronomy.

1. 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.

Word History and Origins

Origin of plasmasphere¹

First recorded in 1965–70; plasma + -sphere

Example Sentences

The plasmasphere of Eisberg differed from that of Earth in two ways.

From Project Gutenberg