differential gearing

20 LETTERS · STARTS WITH D

differential gearing is a valid 20-letter word worth 28 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1F4F4E1R1E1N1T1I1A1L1G2E1A1R1I1N1G2

2 + 1 + 4 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 1 + 2 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does differential gearing mean?