unit rule

9 LETTERS · STARTS WITH U

unit rule is a valid 9-letter word worth 8 points in Scrabble and 12 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

U1N1I1T1R1U1L1E1

1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =8 PTS

DOUBLE WORD → 16TRIPLE WORD → 24

MEANING

What does unit rule mean?