Dictionary

Daltonic en · ADJ

Etymology

From Dalton + -ic.

Meanings

1. (not-comparable) Of or pertaining to the chemist John Dalton, Daltonian.
   • 1866, John Henry Pepper, The Playbook of Metals: A New Edition, page 150, All our ideas are so interwoven with the Daltonic theory that we cannot transform ourselves into the times when it did not exist.
   • An “ion” is an atom of matter—I mean a Daltonic atom; hydrogen, for example—with such an electron attached to it, or detached from it. 1906, The Messenger, page 32:
   • 1875 October 8, S. E. Phillips, The Atomic Weight of the Cerium Metals, William Crooke (editor), The Chemical News, Volume 31: 1875, page 176, It seems to me a cardinal point with many to consider the elements as blank units which may be played with numerically; they coldly and grudgingly accept the Daltonic proportions, and seem to consider it immaterial whether an element be xCl, or x₂Cl₂, or x₃Cl₃, excepting as far as volume or specific heat may determine.
2. (not-comparable) Colour blind, especially red-green colour blind.
   • Here we see the very same restrictions, the same blind — and at best Daltonic — policies of the ideological leaders. 1983, Rimvydas Šilbajoris, Mind Against the Wall: Essays on Lithuanian Culture Under Soviet Occupation, page 109:
   • "[…]I have a cousin with Daltonic vision; it's not so strange in a man not to see the color red." 1994, Olga Bicos, More Than Magic, page 298:
   • Using three tests, bridge', 'differences and 'mosaic', can be as rapid as 1 minute per test but a child slightly Daltonic on PIC may give positive results on only two of the three; which two, cannot be predicted. 1982, R. Fletcher, “Childrens'^([sic]) Tests - Further Applications”, in G. Verriest, editor, Colour Vision Deficiencies, volume 6, page 189:

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