planetary shell

15 LETTERS · STARTS WITH P

planetary shell is a valid 15-letter word worth 22 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3L1A1N1E1T1A1R1Y4S1H4E1L1L1

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

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does planetary shell mean?