English English Wikipedia has an article on:Eastern Catholic ChurchesWikipedia Adjective Eastern Catholic (not comparable) Pertaining to a group of churches, predominantly in Eastern Europe, that follow Eastern Orthodox liturgy but are in full communion with the Roman Catholic Church. Noun Eastern Catholic (plural Eastern Catholics) A member of an Eastern Catholic church. Synonyms Uniate Hypernyms Catholic Hyponyms Armenian Catholic Coptic Catholic Eritrean Catholic Ethiopian Catholic Greek Catholic Maronite Syriac Catholic Coordinate terms Roman Catholic Wikiwand - on Seamless Wikipedia browsing. On steroids.