heliosphere

noun
he·​li·​o·​sphere | \ ˈhē-lē-ə-ˌsfir How to pronounce heliosphere (audio) , -ō- How to pronounce heliosphere (audio) \

Definition of heliosphere

: the region in space influenced by the sun or solar wind

Other Words from heliosphere

heliospheric \ ˌhē-​lē-​ə-​ˈsfir-​ik How to pronounce heliospheric (audio) , -​ˈsfer-​ , -​lē-​ō-​ \ adjective

First Known Use of heliosphere

1967, in the meaning defined above

History and Etymology for heliosphere

helio- + -sphere

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The first known use of heliosphere was in 1967

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