Standard Lemma guide

pion

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈpaɪɒn/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -aɪɒn
  • CMU ARPABET: P AY1 AA2 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.

Definition source: English Wiktionary via Wiktextract

Usage: particle

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a meson involved in holding the nucleus together; produced as the result of high-energy particle collision

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: pi-meson

Antonyms: none provided

Broader terms: meson, mesotron

History

Etymology

From pi + -on, as alteration of pi-meson.

Across languages

Translations

17 source translations are retained for this English entry.

  • Catalan: pió — particle
  • Chinese Mandarin: π介子 (pàijièzǐ) — particle
  • Czech: pion — particle
  • Dutch: pion — particle
  • Finnish: pioni — particle
  • French: pion — particle
  • German: Pion — particle
  • Italian: pione — particle
  • Japanese: パイ粒子 (pai ryūshi) — particle
  • Khmer: ផាយាណូ (phay ya no) — particle
  • Polish: pion — particle
  • Brazilian Portuguese: píon — particle
  • European Portuguese: pião — particle
  • Russian: пио́н (pión) — particle
  • Swedish: pion — particle
  • Swedish: pimeson — particle
  • Tagalog: pay tungapik — particle