preventer plate

15 LETTERS · STARTS WITH P

preventer plate is a valid 15-letter word worth 21 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3R1E1V4E1N1T1E1R1P3L1A1T1E1

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

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does preventer plate mean?