nuclear isomerism

17 LETTERS · STARTS WITH N

nuclear isomerism is a valid 17-letter word worth 22 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1U1C3L1E1A1R1I1S1O1M3E1R1I1S1M3

1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 3 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does nuclear isomerism mean?