Heliosphere Definition
hēlē-ə-sfîr
noun
The region around the sun, extending beyond Pluto, characterized by the presence of the solar magnetic field and the solar wind.
Webster's New World
Other Word Forms of Heliosphere
Noun
Singular:
heliosphere
Plural:
heliospheresOrigin of Heliosphere
helio- + -sphere
From Wiktionary
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