noun Date: 1931 a radioactive nuclear transformation governed by the weak force in which a nucleon (as a neutron) changes into a nucleon (as a proton) of the other type with the emission of either an electron and an antineutrino or a positron and a neutrino
BETA DECAY
Meaning of BETA DECAY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012