tube shutter

12 LETTERS · STARTS WITH T

tube shutter is a valid 12-letter word worth 16 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1U1B3E1S1H4U1T1T1E1R1

1 + 1 + 3 + 1 + 0 + 1 + 4 + 1 + 1 + 1 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does tube shutter mean?