Where does “tricoated” come from?

tricoated (English) comes from English tri, from Proto-Indo-European tréyes — three.

tricoated (English): coated on three sides

Definitions

  1. coated on three sides

Ancestry of “tricoated”, step by step

tricoated traces back through two separate lines of ancestry.

via English tri

StepLanguageWordMeaning
1Englishtritriathlon; triangle
2Proto-Indo-Europeantréyesthree

via English coated

StepLanguageWordMeaning
1Englishcoatedsimple past tense and past participle of coat;...
Every word from Proto-Indo-European tréyesEvery word from English tri