heliosphere Syllabification: (he·li·o·sphere)Pronunciation: /ˈhēlēəˌsfi(ə)r/Definition of heliosphere noun Astronomy the region of space, encompassing the solar system, in which the solar wind has a significant influence. Derivatives heliosphericPronunciation: /ˌhēlēəˈsferik, -ˈsfi(ə)rik/ adjective heliosphere in other Oxford dictionaries Definition of heliosphere in the British & World English dictionary
