protonium

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noun

An exotic atom consisting of a proton bound to an antiproton.

OriginEnglish proton ← Ancient Greek πρῶτον (prôton) ← Proto-Indo-European *pró →
Scrabble 13
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Meanings

nounprotonium (plural protoniums)

plural protoniums

  1. natural sciencesAn exotic atom consisting of a proton bound to an antiproton.

Origin

  1. Proto-Indo-European*per-der.?
  2. Proto-Indo-European*pér
  3. Proto-Indo-European*pró
  4. Ancient Greekπρό (pró)
  5. Ancient Greekπρῶτον (prôton)
  6. Englishproton
  7. Englishprotonium

From proton + -ium.

Full word history & related roots →

Rhymes & wordplay

Anagrams

motuporin
Cite this entry
APA

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

MLA

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

Chicago

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

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