What does "radioactive decay" mean?

Any of several processes by which unstable nuclei emit subatomic particles and/or ionizing radiation and disintegrate into one or more other nuclei.

Radioactive decay

Common synonyms include: decay, decay rate, decays, disintegration, disintegration rate, nuclear decay.

noun

noun ·Rare ·Advanced level

Noun

1
Any of several processes by which unstable nuclei emit subatomic particles and/or ionizing radiation and disintegrate into one or more other nuclei. countable, uncountable
2
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation wordnet