reflection density

18 LETTERS · STARTS WITH R

reflection density is a valid 18-letter word worth 26 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

R1E1F4L1E1C3T1I1O1N1D2E1N1S1I1T1Y4

1 + 1 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 2 + 1 + 1 + 1 + 1 + 1 + 4 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does reflection density mean?