Capias ail respondendum
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A judicial writ, (usually simply termed a "capias,") by which actions at law were frequently commenced; and which commands the sheriff to take the defendant, and him safely keep, so that he may bave his body before the court on a certain day, to answer the plaintiff in the action.
3 Bl. Comm. 282; 1 Tidd, Pr. 128.
The name of this writ is commonly abbreviated to oa. resp.