Meanings
nounheliosphere (plural heliospheres)
plural heliospheres
- astronomyThe region of space where interstellar medium is blown away by solar wind; the boundary, heliopause, is often considered the edge of the Solar System.
The heliosphere isn’t really a sphere at all, more an elongated teardrop shape.
2023, Martin MacInnes, In Ascension, Atlantic Books, page 397
Origin
- Proto-Indo-European*sóh₂wl̥
- Proto-Indo-European*sh₂wél(i)yos
- Proto-Hellenic*hāwélios
- Ancient Greekἥλῐος (hḗlĭos)
- Englishhelio-
- Ancient Greekσφαῖρᾰ (sphaîră)
- Latinsphaera
- Late Latinsphēra
- Old Frenchsphere
- Middle Englishspere
- Englishsphere
- Englishheliosphere
Translations
Catalan heliosfera
- heliosferaregion of space
Danish heliosfære
- heliosfæreregion of space
Finnish heliosfääri
- heliosfääriregion of space
French héliosphère
- héliosphèreregion of space
German Heliosphäre
- Heliosphäreregion of space
Greek ηλιόσφαιρα
- ηλιόσφαιρα (iliósfaira)region of space
Norwegian Bokmål heliosfære
- heliosfæreregion of space
Polish heliosfera
- heliosferaregion of space
Portuguese heliosfera
- heliosferaregion of space
Spanish heliosfera
- heliosferaregion of space
Swedish heliosfär
- heliosfärregion of space
Vietnamese thái dương quyển
- thái dương quyểnregion of space
Cite this entry
APA
heliosphere. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/heliosphere
MLA
“heliosphere.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/heliosphere. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “heliosphere,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/heliosphere.
Source: heliosphere on Wiktionary, CC BY-SA 4.0.