quad line

9 LETTERS · STARTS WITH Q

quad line is a valid 9-letter word worth 18 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

Q10U1A1D2L1I1N1E1

10 + 1 + 1 + 2 + 0 + 1 + 1 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does quad line mean?