Where does “Daltonic” come from?

Daltonic (English) comes from English Dalton, from Old English dæl, from Proto-West Germanic daili, from Proto-Germanic dailiz, from Proto-Indo-European dʰayl- — part, watershed.

Daltonic (English): Of or pertaining to the chemist John Dalton,...

Definitions

  1. Of or pertaining to the chemist John Dalton,...

Ancestry of “Daltonic”, step by step

Daltonic traces back through two separate lines of ancestry.

via English Dalton

StepLanguageWordMeaning
1EnglishDaltona former unit of atomic mass equivalent to 1/16...
2Old Englishdælpart; valley
3Proto-West Germanicdailipart
4Proto-Germanicdailizpart, portion, deal
5Proto-Indo-Europeandʰayl-part, watershed

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of
Every word from Proto-Indo-European dʰayl-Every word from Proto-Germanic dailizEvery word from Proto-West Germanic daili