Source : Webster's Revised Unabridged Dictionary (1913)

Exarchate \Ex*ar"chate\, n. [LL. exarchatus, fr. L. exarchus:
   cf. F. exarchat.]
   The office or the province of an exarch. --Jer. Taylor.

Source : WordNet®

exarchate
     n : a diocese of the Eastern Orthodox Church [syn: {eparchy}]