daltonism

[ dawl-tn-iz-uhm ]

noun

, (sometimes initial capital letter)

1. color blindness, especially the inability to distinguish red from green.

daltonism

/ ˈdɔːltəˌnɪzəm; dɔːlˈtɒnɪk /

noun

1. colour blindness, esp the confusion of red and green

Derived Forms

• daltonic, adjective

Other Words From

• dal·ton·ic [dawl-, ton, -ik], adjective

Word History and Origins

Origin of daltonism¹

1835–45; J. Dalton + -ism

Word History and Origins

Origin of daltonism¹

C19: from French daltonisme, after John Dalton

Example Sentences

Red-green color vision deficiency is also called Daltonism, after John Dalton, the English chemist from the 1790s.

From Scientific American

Color blindness, a condition from which he suffered, was for a long time called Daltonism because of his studies.

From Literature

Daltonism, the commonest form of color-blindness in which the affected individual is unable to discriminate between red and green.

From Project Gutenberg

Color blindness; inability to distinguish colors; Daltonism.

From Project Gutenberg

In 1794 he was elected a member of the Manchester Literary and Philosophical Society, and a few weeks after election he communicated his first paper on “Extraordinary facts relating to the vision of colours,” in which he gave the earliest account of the optical peculiarity known as Daltonism or colour-blindness, and summed up its characteristics as observed in himself and others.

From Project Gutenberg