For a scene in my current work in progress, I wanted to know what the proper term is for the skullcap worn by bishops in the Catholic Church. So I Googled archbishop skullcap, as you do.
The word is zucchetto. It comes from the Italian for … Pumpkin. (Because, apparently, the little caps—worn to keep the bishops’ heads warm—reminded people of pumpkins cut in half.)
I ended up going with “archbishop’s skullcap” in the manuscript.