density rule

12 LETTERS · STARTS WITH D

density rule is a valid 12-letter word worth 15 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2E1N1S1I1T1Y4R1U1L1E1
2 + 1 + 1 + 1 + 1 + 1 + 4 + 0 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does density rule mean?

1