Mid 17th century; earliest use found in Thomas Fuller (1607/8–1661), Church of England clergyman. From post-classical Latin abbat-, abbasabbot + -ical, apparently after sabbatical. Compare post-classical Latin abbaticus.
Definition of abbatical in US English:
abbatical
adjectiveəˈbatɪkl
Abbatial.
Origin
Mid 17th century; earliest use found in Thomas Fuller (1607/8–1661), Church of England clergyman. From post-classical Latin abbat-, abbas abbot + -ical, apparently after sabbatical. Compare post-classical Latin abbaticus.