Source : Webster's Revised Unabridged Dictionary (1913)

Dichromatic \Di`chro*mat"ic\, a. [Pref. di- + chromatic: cf. Gr.
   ?.]
   1. Having or exhibiting two colors.

   2. (Zo["o]l.) Having two color varieties, or two phases
      differing in color, independently of age or sex, as in
      certain birds and insects.

Source : WordNet®

dichromatic
     adj 1: of or relating to dichromatism
     2: having two colors; "a bicolor flower"; "a bicolored postage
        stamp" [syn: {bicolor}, {bicolour}, {bicolored}, {bicoloured},
         {bichrome}]