expansion pulley

16 LETTERS · STARTS WITH E

expansion pulley is a valid 16-letter word worth 29 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

E1X8P3A1N1S1I1O1N1P3U1L1L1E1Y4

1 + 8 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 4 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does expansion pulley mean?