tappet motion

13 LETTERS · STARTS WITH T

tappet motion is a valid 13-letter word worth 18 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1A1P3P3E1T1M3O1T1I1O1N1

1 + 1 + 3 + 3 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does tappet motion mean?