Lewis & Short

sălūtātōrĭus, a, um, adj. [saluto] (postAug.).

  1. I. Of or belonging to visiting or paying court: cubilia, an audience-chamber, Plin. 15, 11, 10, § 38.
    As subst.: să-lūtātōrĭum, i, n., the audience-chamber, Cassiod. Hist. Eccl. 9, 30.
  2. II. In gram.. salutatorius casus, i. e. the vocative, acc. to Prisc. p. 671 P.