trichromatic

from WordNet (r) 3.0 (2006)

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}]

from The Collaborative International Dictionary of English v.0.48

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]

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