Habeas corpus ad testificandum
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A writ to bring a witness into court, when he is in custody at the time of a trial, commanding the sheriff to have his body before the court, to testify in the cause.
3 Bl. Comm. 130; 2 Tidd, Pr. 809. Ex parte Marmaduke, 91 Mo. 250, 4 S. W. 91, 60 Am. Rep 250.