Definition of "daltonism" []

• An inherited defect in perception of red and green; red-green colorblindness. (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.

• "a victim of daltonism -- in other words, colour-blind!"
• "Red-green colorblindness is called "daltonisme" (daltonism in English), and they all come from the name of English physicist John Dalton, who studied and described the condition at the end of the 18th century."
• "Red-green colorblindness is called "daltonisme" daltonism in English, and they all come from the name of English physicist John Dalton, who studied and described the condition at the end of the 18th century."