catholicos

noun

ca·​thol·​i·​cos kə-ˈthȯ-li-kȯs 

plural catholicoses kə-ˈthȯ-li-kȯ-səz  or catholicoi kə-ˈthȯ-li-ˌkȯi 

often capitalized

: a primate of certain Eastern churches and especially of the Armenian or of the Nestorian church

Word History

Etymology

Late Greek katholikos, from Greek, general

First Known Use

1878, in the meaning defined above