三层桨座之战船
Trireme \Tri"reme\, n. [L. triremis; tri- (see {Tri-}) + remus an oar, akin to E. row. See Row to propel with an oar.] (Class. Antiq.) An ancient galley or vessel with tree banks, or tiers, of oars.
trireme n : ancient Greek or Roman galley or warship having three tiers of oars on each side