a legal document issued to halt or delay the action of some process of law
See supersedeas in American Heritage Dictionary 4
su·per·se·de·as
noun
A writ containing a command to stay legal proceedings, as in the halting or delaying of the execution of a sentence.
Origin: Middle English, from Medieval Latin supersedeās, you must desist (from the writ), from Latin, second person sing. present subjunctive of supersedēre, to desist from; see supersede .