sign factor

11 LETTERS · STARTS WITH S

sign factor is a valid 11-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1I1G2N1F4A1C3T1O1R1

1 + 1 + 2 + 1 + 0 + 4 + 1 + 3 + 1 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does sign factor mean?