first derivative

NOUN /fɜrst_dɪ'rɪvətɪv/
16 LETTERS · STARTS WITH F

first derivative is a valid 16-letter word worth 25 points in Scrabble and 27 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4I1R1S1T1D2E1R1I1V4A1T1I1V4E1
4 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 4 + 1 + 1 + 1 + 4 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does first derivative mean?

NOUN · 1 SENSE
1

The result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx.