integral equation

17 LETTERS · STARTS WITH I

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

SCRABBLE WORDS WITH FRIENDS

I1N1T1E1G2R1A1L1E1Q10U1A1T1I1O1N1

1 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 0 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 1 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does integral equation mean?