sēvĭrālis — Lewis & Short
sēvĭrālis, e, adj.sevir,
I of or belonging to a sexvir:
ludi,of the equestrian sexvirs, Capitol. M. Aurel. 6: cena, of the Augustan sexvirs.—Hence, subst.: sēvĭrā-les, ium, the Augustan sexvirs:
ORDO SEVIRALIVM,Inscr. Orell. 2229; Inscr. Murat. 1104, 7.