tristimulus values

18 LETTERS · STARTS WITH T

tristimulus values is a valid 18-letter word worth 22 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1R1I1S1T1I1M3U1L1U1S1V4A1L1U1E1S1

1 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does tristimulus values mean?