atomic disintegration

21 LETTERS · STARTS WITH A

atomic disintegration is a valid 21-letter word worth 26 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1T1O1M3I1C3D2I1S1I1N1T1E1G2R1A1T1I1O1N1

1 + 1 + 1 + 3 + 1 + 3 + 0 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does atomic disintegration mean?