The Discripter “Catholic” ?
What are it’s origins?
It means “universal”—it is already found in the Nicene Creed. In Augustine’s day it was used of the churches in North Africa which were in communion with those elsewhere (as opposed to the Donatists).
There’s a big difference between “small-’c’ catholics (body of Christ) and “capital-’C’ Catholics (denomination / cult).
The church we go to reads/recites “Creeds” which have “catholic” in them. I’m not a fan of any creed, but do read them with the congregation.