Meanings
nounhelionium (plural helionia)
plural helionia
- Any atomic system containing a helium nucleus and an antihelium nucleus.
Origin
- Proto-Indo-European*sóh₂wl̥
- Proto-Indo-European*sh₂wél(i)yos
- Proto-Hellenic*hāwélios
- Ancient Greekἥλιος (hḗlios)
- New Latinhelium
- Englishhelium
- Englishonium
- Englishhelionium
* (helion-antihelion pair): helium + -onium
Full word history & related roots →Cite this entry
APA
helionium. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/helionium
MLA
“helionium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/helionium. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “helionium,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/helionium.
Source: helionium on Wiktionary, CC BY-SA 4.0.