mŏnēris, is, f., = μονήρης (sc. ναῦς),
a vessel with a single bank of oars, a galley , Liv. 38, 38, 8 (cf. Tac. H. 5, 23).
monēris is, f , μονήρης, a vessel with a single bank of oars, galley, L. ...
An Elementary Latin Dictionary