What is Apostata Capiendo?

Legal Definition
Apostate capiendo (Latin for "taking an apostate") was an old English writ against an individual. It prescribed the arrest of a person, who having entered and professed some religious order (such as a monk), broke from his cloister, contrary to the rules of his order.
-- Wikipedia
Legal Definition
An obsolete English writ which issued against an apostate, or one who had violated the rules of his religious order. It was addressed to the sheriff, and commanded him to deliver the defendant into the custody of the abbot or prior. Reg. Orig. 7l, 267; Jacob ; Wharton.
-- Black's Law Dictionary
Legal Definition
A writ under which an apostate was seized by the sheriff and brought before the abbott.
-- Ballentine's Law Dictionary