difference table

16 LETTERS · STARTS WITH D

difference table is a valid 16-letter word worth 26 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1F4F4E1R1E1N1C3E1T1A1B3L1E1

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

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does difference table mean?