In full "Act of Adjournal". Originally: a ruling of a criminal court, specifically one ordering a particular party to satisfy another within a specified time (now historical). Later: any ruling or regulation made by the High Court of Justiciary relating to judicial procedure in criminal courts.
In full "Books of Adjournal". A register of Acts of Adjournal.
((n.) Adjournment; postponement.)
Origin:
Late 15th century. From adjourn + -al. Compare earlier adjourning, adjournment.