Katzpur,
Catholic is Greek derived, not Latin. It comes from kata holos, which means according to the whole. Roman Catholics will generally tell you this means universal, but this is not strictly true. If it were, how could a parish be Catholic? For us, the word Catholic means that we follow the Catholic faith, that which has been believed by all, always and everywhere, to paraphrase St. Vincent of Lerins. Incidentally, the Greek word for universal is ecumenical, although as the Empire was known in the Greek speaking world as the Oekumene, this can also mean Imperial, as in the title of the Patrirach of Constantinople.
The undivided Church was known simply as the Catholic Church (though the adjectives Roman - referring to the Empire - and Orthodox were also used at times by certain people). Since the Great Schism we have referred to ourselves as the Holy Orthodox Catholic Church (Orthodox meaning right-believing and right-worshipping) to differentiate ourselves from the See of Rome, though westerners refer to us as Eastern Orthodox. I believe that the Roman Catholic name is not officially used by RCs, who call themselves simply Catholic, but was first used by Protestants. We tend to use it also when referring to RCs as it is a useful name for distinguishing them from us, though far less charitable names have also been used at times. Hope that's of some help, even though I'm not totally clear on the development of the post-Schism term Roman Catholicism.
James
