parishionaten.
Origin: Formed within English, by derivation. Etymons: parishioner n., -ate suffix1.
Etymology: < parishion- (in parishioner n.) + -ate suffix1.
rare.
1910 3 Sept. 363 The archiepiscopal diocese with its parishionate of nearly four million souls.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).