noun

• 1(typically in an animal species) the occurrence of two different kinds of coloring.

  ‘One of the most conspicuous ornamental traits in avian sexual dichromatism is carotenoid-based plumage coloration.’

  More example sentences

  • ‘Sex of each chick at six weeks of age was recorded, when sexual plumage dichromatism became unambiguous.’
  • ‘In no case did we find a significant interaction between sexual dichromatism and year.’
  • ‘Extrapair paternity has been reported to be strongly positively associated with sexual dichromatism.’
  • ‘Collection of the goldfinches took place when plumage dichromatism between males and females is subtle.’

• 2Color-blindness in which only two of the three primary colors can be discerned.