diophantine equation

20 LETTERS · STARTS WITH D

diophantine equation is a valid 20-letter word worth 34 points in Scrabble and 38 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

D2I1O1P3H4A1N1T1I1N1E1E1Q10U1A1T1I1O1N1

2 + 1 + 1 + 3 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 1 =34 PTS

DOUBLE WORD → 68TRIPLE WORD → 102

MEANING

What does diophantine equation mean?