shadow nucleus

14 LETTERS · STARTS WITH S

shadow nucleus is a valid 14-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1H4A1D2O1W4N1U1C3L1E1U1S1

1 + 4 + 1 + 2 + 1 + 4 + 0 + 1 + 1 + 3 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does shadow nucleus mean?