second derivative

17 LETTERS · STARTS WITH S

second derivative is a valid 17-letter word worth 26 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1E1C3O1N1D2D2E1R1I1V4A1T1I1V4E1

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

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does second derivative mean?