Word.ws English Dictionary

pionium

pionium noun: an exotic atom equivalent to a hydrogen atom with the proton replaced by a pion.

Noun

pionium (plural pioniums)

  1. an exotic atom equivalent to a hydrogen atom with the proton replaced by a pion
    Synonyms:
    pi-mu atom
  2. an onium where the bound antiparticle-particle pair is a pion and an antipion.

Synonyms of pionium

  • pi-mu atom

Forms of pionium

pluralpioniums

Origin of pionium

From pion + -ium.

Questions about pionium

What does pionium mean?
Pionium means an exotic atom equivalent to a hydrogen atom with the proton replaced by a pion.
What part of speech is pionium?
Pionium is a noun.
What is the plural of pionium?
The plural of pionium is pioniums.

Words near pionium in the dictionary

  1. pioney
  2. pioneys
  3. pionful
  4. pionic
  5. pionies
  6. pionium
  7. pioniums
  8. pionless
  9. pionlike
  10. pions
  11. Piontek

Source and license

Adapted from Wiktionary: pionium (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “pionium.” Word.ws, https://word.ws/pionium. Based on Wiktionary, CC BY-SA 4.0.