Lewis Short
(adjective) : sēnārĭus, a, um, seni.
* In gen., consisting of six each; fistula, six quarter-digits (quadrantes) in diameter, Front. Aquaed. 25: numerus,the number six,Macr. Somn. Scip. 1, 6.
* In partic.: versus, a verse consisting of six feet (usu. iambics), Quint. 9, 4, 125; Phaedr. 1, prol. 2.—More freq. as subst.: sēnārĭus, ii, m., Cic. Or. 55, 184; 56, 189; Quint. 9, 4, 72; 9, 4, 140 al.
Charlton T. Lewis, Charles Short, A Latin Dictionary