shell edging

12 LETTERS · STARTS WITH S

shell edging is a valid 12-letter word worth 17 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1H4E1L1L1E1D2G2I1N1G2

1 + 4 + 1 + 1 + 1 + 0 + 1 + 2 + 2 + 1 + 1 + 2 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does shell edging mean?