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⇱ beta decay - WordReference.com Dictionary of English


WordReference Random House Unabridged Dictionary of American English © 2026
be′ta decay′, [Physics.]
  1. Physicsa radioactive process in which a beta particle is emitted from the nucleus of an atom, raising the atomic number of the atom by one if the particle is negatively charged, lowering it by one if positively charged.
  • 1930–35

Collins Concise English Dictionary © HarperCollins Publishers::
beta decay n
  1. the radioactive transformation of an atomic nucleus accompanying the emission of an electron. It involves unit change of atomic number but none in mass number
'beta decay' also found in these entries (note: many are not synonyms or translations):

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