carrier shell

13 LETTERS · STARTS WITH C

carrier shell is a valid 13-letter word worth 17 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3A1R1R1I1E1R1S1H4E1L1L1

3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 1 + 1 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does carrier shell mean?