(n.) Inability to perceive or distinguish certain colors, especially red; color blindness. It has various forms and degrees. So called from the chemist Dalton, who had this infirmity.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). daltonism. Retrieved September 22, 2026, from http://smartdefine.org/daltonism/definitions/1994332 |
| Chicago | Webster's. 2011. "daltonism" http://smartdefine.org/daltonism/definitions/1994332 (accessed September 22, 2026). |
| Harvard | Webster's 2011, daltonism, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/daltonism/definitions/1994332>. |
| MLA | Webster's. "daltonism" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/daltonism/definitions/1994332> |