catholicos

< /kəˈθɒl ɪˌkɔɪ/.

1. (often initial capital letter) Eastern Church.
   1. any of the heads of certain autocephalous churches.
   2. (in some autocephalous churches) a primate subject to a patriarch and having authority over metropolitans.
2. (in the early Christian church) the head of monasteries in the same city.

noun

1. the patriarch of the Armenian Church