Crossword clue: the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

The most common answer is radioactivity (13 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

radioactivity 13 letters wn-def

the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay