index bar

9 LETTERS · STARTS WITH I

index bar is a valid 9-letter word worth 18 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1D2E1X8B3A1R1

1 + 1 + 2 + 1 + 8 + 0 + 3 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does index bar mean?