tristimulus

adjective
tri·stim·u·lus | \(ˌ)trī-ˈstim-yə-ləs \

Definition of tristimulus 

: of or relating to values giving the amounts of the three colored lights red, green, and blue that when combined additively produce a match for the color being considered

First Known Use of tristimulus

1933, in the meaning defined above

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The first known use of tristimulus was in 1933

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one that holds something together

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