dĕcēris — Lewis & Short
dĕcēris, is, f., = dekh/rhs (sc. nau=s),
I a ten-oared ship, i. e. a ship having ten banks of oars:
Liburnicas,Suet. Calig. 37 (acc. to a conject. of Turneb. Adv. 22, 30; lect. vulg. de cedris).