shell bit

9 LETTERS · STARTS WITH S

shell bit is a valid 9-letter word worth 13 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1H4E1L1L1B3I1T1

1 + 4 + 1 + 1 + 1 + 0 + 3 + 1 + 1 =13 PTS

DOUBLE WORD → 26TRIPLE WORD → 39

MEANING

What does shell bit mean?