excŭbĭtor, ōris, m. [excubo],
one who keeps guard , a watchman , guard , sentinel : haec eadem (castella) noctu excubitoribus ac firmis praesidiis tenebantur, Caes. B. G. 7, 69 fin. : tribunus excubitor, the captain of the guard , Suet. Claud. 42; id. Ner. 8.— Of a dog: quis excubitor inveniri potest vigilantior? Col. 7, 12, 1.—Of a cock: excubitor ales, Verg. M. 2.