a. [f. Gr. τρι-, TRI- + χρώμα color + -IC: cf. DICHROMIC.] Three-colored, three-color; = TRICHROMATIC.
In quot. 1900 applied to abnormal vision in which only three different colors are perceived.
1881. Le Conte, Sight, 63. Herschel regarded normal vision as trichromic.
1897. Daily News, 6 Jan., 3/3. By the method of trichromic photography … the colours of natural objects were shown.
1900. Edridge-Green, in Lancet, 4 Aug., 323/1. A person whose colour vision is trichromic may see a spectrum of the same length as the normal-sighted, but he sees only three colours—red, green, and violet.
