The story
- Proto-Indo-European*sóh₂wl̥
- Proto-Indo-European*sh₂wél(i)yos
- Proto-Hellenic*hāwélios
- Ancient Greekἥλῐος (hḗlĭos)
- Englishhelio-
- Englishsheath
- English todayheliosheath
Etymology from Wiktionary, CC BY-SA 4.0.
heliosheath
Today it means: A zone between the termination shock and the heliopause, in the heliosphere, at the outer border of the Solar System, where the solar wind is dramatically slower than within the termination shock. Full definition →
English sheath ← Ancient Greek ἥλῐος (hḗlĭos) ← Proto-Hellenic *hāwélios