Where does “trifocals” come from?

trifocals (English) comes from English focal, from New Latin focālis.

trifocals (English): Spectacles with corrective lenses that have three...

Definitions

  1. Spectacles with corrective lenses that have three...

Ancestry of “trifocals”, step by step

trifocals traces back through two separate lines of ancestry.

via English focal

StepLanguageWordMeaning
1EnglishfocalBelonging to, concerning, or located at a focus;...
2New Latinfocālis—

via English tri

StepLanguageWordMeaning
1Englishtritriathlon; triangle
2Proto-Indo-Europeantréyesthree
Every word from New Latin focālis →