Lewis & Short

versōrĭa (vors-), ae, f. [verto], a rope that guides a sail, a sheet (Plautin.); hence, trop.: versoriam capere, to turn the sail, i. e. tack: cape vorsoriam, Recipe te ad erum, about ship! Plaut. Trin. 4, 3, 19: cape modo vorsoriam, id. Merc. 5, 2, 34.