Roman catholic

1. имя существительное католик 2. прилагательное римско-католический

Большой англо-русский словарь

Roman catholic

I. noun a member of the Roman Catholic Church II. adjective of, relating to, or being a Christian church having a hierarchy of priests and bishops under the pope, a liturgy centered in the Mass, veneration of the Virgin Mary and saints, clerical celibacy, and a body of dogma including transubstantiation and papal infallibility

Merriam-Webster's Collegiate Dictionary