subtraction mark

16 LETTERS · STARTS WITH S

subtraction mark is a valid 16-letter word worth 25 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1U1B3T1R1A1C3T1I1O1N1M3A1R1K5

1 + 1 + 3 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 5 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does subtraction mark mean?