ecclesiarch

from The Collaborative International Dictionary of English v.0.48

Ecclesiarch \Ec*cle"si*arch\, n. [LL. ecclesiarcha, fr. Gr. ?
   church + ? to rule: cf. F. eccl['e]siarque.]
   An official of the Eastern Church, resembling a sacrist in
   the Western Church.
   [1913 Webster]