dichromatism

/D AY1 K R OW0 M AH0 T IH0 Z AH0 M/
noun
  1. 1

    The condition of being dichromatic

  2. 2

    A form of colourblindness in which only two of the three primary colours can be distinguished

  3. 3

    The condition when male and female birds have different plumage colors.

Source: https://en.wiktionary.org/wiki/dichromatism