to plough round , mark out with a plough : urvat, Ennius in Andromedā significat circumdat, ab eo sulco, qui fit in urbe condendā urvo aratri ... Ait autem: Circum sese urvat ad pedes, etc., Fest. p. 375 Müll. N. cr. (Trag. v. 141 Vahl.); cf.: urvare est aratro definire, Dig. 50, 16, 239, § 6.