thumb piston

12 LETTERS · STARTS WITH T

thumb piston is a valid 12-letter word worth 20 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1H4U1M3B3P3I1S1T1O1N1

1 + 4 + 1 + 3 + 3 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does thumb piston mean?