cœnobiarchn.
Etymology: < late Greek κοινοβιάρχης, < κοινόβιον cœnobium n. + -αρχης ruler.Previous versions of the OED give the stress as: cœˈnobiarch.
1721 in Bailey .
1775 in Ash .
This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2019).