excubitor
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
Latin > English (Lewis & Short)
excŭbĭtor: ōris, m. excubo,
I 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.
