photo-trichroˈmatic, a.
[f. photo- 2 + trichromatic.]
Of or pertaining to three colours used in colour-photography, or to colour-photography in which three colours are used.
| 1896 C. G. Zander (title) Photo-trichromatic printing. 1904 Westm. Gaz. 2 May 9/3 The photo-trichromatic inks of commerce are not optically the true complements of the red, violet, and green, which are the primary colour sensations. |