in par·ti·bus in·fi·de·li·um foreign term \in-ˈpär-ti-ˌbu̇s-ˌin-fi-ˈdā-lē-ˌu̇m\
in the regions of the infidels —used of a titular bishop having no diocesan jurisdiction, usually in non-Christian countries
Origin of IN PARTIBUS INFIDELIUM
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