diaphragm shutter

17 LETTERS · STARTS WITH D

diaphragm shutter is a valid 17-letter word worth 28 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1A1P3H4R1A1G2M3S1H4U1T1T1E1R1

2 + 1 + 1 + 3 + 4 + 1 + 1 + 2 + 3 + 0 + 1 + 4 + 1 + 1 + 1 + 1 + 1 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does diaphragm shutter mean?