Lewis Short
(adjective) : sagmārĭus, a, um, sagma
* Of or belonging to a pack-saddle (post-class.): equus,a pack-horse,Lampr. Heliog. 4; Aur. ap. Vop. Aur. 7, 7; cf.: caballus, mula,Isid. Orig. 20, 16, 5.
Charlton T. Lewis, Charles Short, A Latin Dictionary