ninth chord

11 LETTERS · STARTS WITH N

ninth chord is a valid 11-letter word worth 19 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

N1I1N1T1H4C3H4O1R1D2

1 + 1 + 1 + 1 + 4 + 0 + 3 + 4 + 1 + 1 + 2 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does ninth chord mean?