Definition of: dichromatic

(dī′krō·mat′ik) adjective
1. Having either of two colors.
2. Zool. Having two color phases: said of certain birds and insects, etc., that, apart from changes due to age or sex, exhibit a coloration differing from the normal.
3. Pathol. Affected with blue-, green-, or red–blindness; able to see only two of the three primary colors.