Unscramble

r 1 a 1 d 2 i 1 o 1 a 1 c 3 t 1 i 1 v 4 i 1 t 1 i 1 e 1 s 1

15 letters · 21 points in Scrabble

Meaning

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

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