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:
heliospheres

Origin of Heliosphere

  • helio- +‎ -sphere

    From Wiktionary

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heliosphere