The story
- Latin · borrowed fromtertius“third”
- English todaytertial
From Latin tertius (“third”); the tertial feathers are the third row of feathers. By surface analysis, terti- + -al.
Words from the same roots
Latintertius all →
tercel gentletercinetert-terti-terzettotiercel
Etymology from Wiktionary, CC BY-SA 4.0.