Definition of "dichromatism" []

• The quality or condition of being dichromatic. (noun)
• Pathology A form of colorblindness in which only two of the three fundamental colors can be distinguished due to a lack of one of the cone pigments. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This extreme sexual dichromatism different color morphs is very, very rare."
• "The pumas were for the most part bright red, but some were reddish gray, there being much the same dichromatism that I found among their Colorado kinsfolk."
• "These dwarf cichlids are characterised by distinct sexual dimorphism and dichromatism - so males and females differ markedly in colour and size."