| NOUN | process | radioactive decay, decay, disintegration | the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation |
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| Meaning | The spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation. | |
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| Synonyms | decay, disintegration | |
| Narrower | alpha decay | radioactive decay of an atomic nucleus that is accompanied by the emission of an alpha particle |
| beta decay | radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle | |
| Broader | nuclear reaction | (physics) a process that alters the energy or structure or composition of atomic nuclei |
| Spanish | radiactividad | |
| Catalan | radioactivitat | |
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