Phrase guide

beta decay

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

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A nuclear reaction in which a beta particle (electron or positron) is emitted.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Qualifier: nuclear physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: decay, radioactive decay, disintegration

History

Etymology

No etymology was provided for this word.

Across languages

Translations

6 source translations are retained for this English entry.

  • Finnish: beetahajoaminen — nuclear reaction
  • German: Betazerfall — nuclear reaction
  • Japanese: ベータ崩壊 (bēta hōkai) — nuclear reaction
  • Polish: rozpad beta — nuclear reaction
  • Russian: бета-распад (beta-raspad) — nuclear reaction
  • Swedish: betasönderfall — nuclear reaction