photomultiplier tube

20 LETTERS · STARTS WITH P

photomultiplier tube is a valid 20-letter word worth 30 points in Scrabble and 37 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3H4O1T1O1M3U1L1T1I1P3L1I1E1R1T1U1B3E1

3 + 4 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 1 =30 PTS

DOUBLE WORD → 60TRIPLE WORD → 90

MEANING

What does photomultiplier tube mean?