Source : Webster's Revised Unabridged Dictionary (1913)

Trichromic \Tri*chro"mic\, a. [Pref. tri- + Gr. ? color.] (Opt.)
   Of, pertaining to, or consisting of, three colors or color
   sensations.

Trichromic \Tri*chro"mic\, a. [Pref. tri- + chromic.] (Chem.)
   Containing three atoms of chromium.