clamshell door

14 LETTERS · STARTS WITH C

clamshell door is a valid 14-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3L1A1M3S1H4E1L1L1D2O1O1R1

3 + 1 + 1 + 3 + 1 + 4 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does clamshell door mean?