visual property

NOUN
15 LETTERS · STARTS WITH V

visual property is a valid 15-letter word worth 24 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
V4I1S1U1A1L1P3R1O1P3E1R1T1Y4
4 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 4 =24 PTS
DOUBLE WORD → 48TRIPLE WORD → 72
MEANING

What does visual property mean?