trichromatic
    adj 1: having or involving three colors; "trichromatic vision";
           "a trichromatic printing process"; "trichromatic staining
           is the staining of tissue samples differentially in three
           colors"; "tricolor plumage"; "a tricolor process in
           photography" [syn: trichromatic, trichrome,
           tricolor]

Trichromatic \Tri`chro*mat"ic\, a. [Pref. tri- + chromatic.]
   (Zool.)
   Having or existing in three different phases of color; having
   three distinct color varieties; -- said of certain birds and
   insects.
   [1913 Webster]