Lewis Short
(adjective) : septēnārĭus, a, um, septem
* Containing seven, consisting of seven, septenary: numerus,the number seven,Plin. 11, 36, 43, § 120; Gell. 3, 10, 1 sq.; Macr. Somn. Scip. 1, 6: versus,consisting of seven feet,Diom. p. 514 P.; also absol., a verse consisting of seven feet: cum tam bonos septenarios fundat ad tibiam,Cic. Tusc. 1, 44, 107: synthesis,a service of seven goblets,Mart. 4, 46, 15: fistula, of seven quadrants (or quarter-digits) in diameter, Front. Aquaed. 25; 41.
Charlton T. Lewis, Charles Short, A Latin Dictionary