† ˈpentereme,a.Obs.rare. [f.Gr. πέντε five + L. rēmus oar.] See quot. 1656. 1656Blount Glossogr., Pentireme, a Galley that has five Oares in a seat or rank, or a Galley wherein every oar hath five men to draw it. See Quinquereme.1844Thirlwall Greece VIII. lxiv. 266 A fleet of sixty pentereme galleys.