nuclear envelope

16 LETTERS · STARTS WITH N

nuclear envelope is a valid 16-letter word worth 22 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1U1C3L1E1A1R1E1N1V4E1L1O1P3E1

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

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does nuclear envelope mean?