Definify.com
Webster 1913 Edition
Quadrireme
Quad′ri-reme
,Noun.
 [L. 
quadriremis
; quattuor 
four + remus 
an oar: cf. F. quadrirème
.] (Antiq.) 
A galley with four banks of oars or rowers. 
Webster 1828 Edition
Quadrireme
QUAD'RIREME
,Noun.
  A galley with four benches of oars or rowers.