differential operator

21 LETTERS · STARTS WITH D

differential operator is a valid 21-letter word worth 29 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1F4F4E1R1E1N1T1I1A1L1O1P3E1R1A1T1O1R1

2 + 1 + 4 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =29 PTS

DOUBLE WORD → 58TRIPLE WORD → 87

MEANING

What does differential operator mean?