βαλβίς
βαλβίς
deriv. uncertain
properly, the rope drawn across the race-course: mostly in pl., Lat. carceres, the posts marking the line whence the racers started, and to which they returned, Ar.:—then, any starting point, Eur., Ar.; metaph., πρὸς βαλβῖδα βίου Eur.
also any point to be gained, as the battlements (by one scaling a wall), Soph.