Lewis & Short

dĭcātĭo, ōnis, f. [1. dico, no. II. B. 1.].

  1. I. A formal declaration of intention to become a citizen, Cic. Balb. 11 (v. the passage in its connection).
  2. II. = praedicatio, a praising.
    1. A. Prop., Cod. Theod. 9, 3, 2.
    2. B. As a title: tua dicatio, your Reverence, Cod. Theod. 11, 30, 1; Lact. Mort. pers. 48 al.