beak Copy link • beak: rostrum: (i) Of birds: birds with a horny and long b., aves corneo proceroque r., Cic.: Liv.: Ov. A little b., rostellum: Col.: Plin. (ii) Of ships: to damage ships with a b., navibus r. nocere, Caes.: the ship received the blow of the other's b. on its side, navis obliqua ictum alterius rostri accepit, Liv.: Ov.