U / undĕcĭrēmis
noun

undĕcĭrēmis

gen. undĕcĭrēmis · gender feminine · decl. 3rd
(sc. navis) [undecim-remus]
a ship of eleven banks of oars
a ship of eleven banks of oars, Plin. 16, 40, 76, § 203.