Black's Law Dictionary (2nd edition)dictionaries

Voco

Lat in the civil and old Eng-llsh law. I call; I summon; I vouch. In jus voco te, I summon you to court; I sum-mon you before the pnetor. The formula by which a Roman action was anciently commenced. Adams, Rom. Ant. 242

Source: Black’s Law Dictionary 2nd Ed (1910)