dichromatism

English

Etymology

di- +‎ chromatism

Noun

dichromatism (countable and uncountable, plural dichromatisms)

  1. The condition of being dichromatic
  2. (pathology) A form of colourblindness in which only two of the three primary colours can be distinguished
  3. (biology) The condition when male and female birds have different plumage colors.
    • 2010, Geoffrey E. Hill, ‎Geoffrey Edward Hill, National Geographic Bird Coloration
      There long had been a bias among researchers to think of the evolution of sexual dichromatism as driven by changes in male coloration.
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