difference engine

17 LETTERS · STARTS WITH D

difference engine is a valid 17-letter word worth 26 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1F4F4E1R1E1N1C3E1E1N1G2I1N1E1

2 + 1 + 4 + 4 + 1 + 1 + 1 + 1 + 3 + 1 + 0 + 1 + 1 + 2 + 1 + 1 + 1 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does difference engine mean?