1. [ noun ] (physics,nuclear physics) the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
Synonyms: disintegration decay
Related terms: nuclear_reaction alpha_decay beta_decay disintegrate
2. [ noun ] (biology,physics) the phenomenon of spontaneous changes in the nucleus of an atom
Synonyms: decomposition decay
Related terms: physical_phenomenon organic_phenomenon decompose
Similar spelling:   radioactive_dust