helion

H4E1L1I1O1N1

noun

Any helium ion, the nucleus of any helium atom.

Opposite
antihelion
OriginEnglish electronbf. ← Ancient Greek ἰόν (ión) ← Proto-Hellenic *éimi →
UncommonScrabble 9
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Meanings

helion1

nounhelion (plural helions)

plural helions

  1. sometimesnatural sciencesAny helium ion, the nucleus of any helium atom.
    1. sometimesusuallynatural sciencesA helium-3 ion, the nucleus of a helium-3 atom. Formula: ³He⁺².

      Antonyms: antihelion

helion2

nounhelion (plural helions)

plural helions

  1. astronomyA meteoroid that arrives from the approximate direction of the Sun.

Synonyms & antonyms

nounA helium-3 ion, the nucleus of a helium-3 atom. Formula: ³He⁺².

Opposite
antihelion

Origin

  1. Proto-Indo-European*sóh₂wl̥
  2. Proto-Indo-European*sh₂wél(i)yos
  3. Proto-Hellenic*hāwélios
  4. Ancient Greekἥλιος (hḗlios)
  5. New Latinhelium
  6. Englishhelium
  7. Ancient Greekἤλεκτρον (ḗlektron)
  8. Latinēlectrum
  9. New Latinēlectricus
  10. Englishelectric
  11. Proto-Indo-European*h₁ey-
  12. Proto-Indo-European*h₁éyti
  13. Proto-Hellenic*éimi
  14. Ancient Greekἰόν (ión)
  15. Englishion
  16. Englishelectronbf.
  17. Englishhelion

From helium + -on.

Full word history & related roots →

Translations

Chinese Mandarin 氦核
  • 氦核 (hàihé)nucleus of a helium-3 atom
Finnish helium-3 atomin ydin
  • helium-3 atomin ydinnucleus of a helium-3 atom
French hélion
  • hélionnucleus of a helium-3 atom
Italian elione
  • elionenucleus of a helium-3 atom
Russian гелио́н
  • гелио́н (gelión)nucleus of a helium-3 atom
Cite this entry
APA

helion. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/helion

MLA

“helion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/helion. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “helion,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/helion.

Source: helion on Wiktionary, CC BY-SA 4.0.