Lewis & Short

Anxur (rarely written Anxyr, Prob. p. 1459 P.), ŭris, n. (m., Mart. 5, 1; 10, 58 al., as lying upon a mountain of the same name).

  1. I. An ancient town in Latium, situated not far from the sea-shore, afterwards also called Tarracina, now Terracina, Enn. ap. Fest. p. 19: Tarracina oppidum linguā Volscorum Anxur dictum, Plin. 3, 5, 9, § 59; Hor. S. 1, 5, 26; cf. Mann. Ital. 1, 626 sq. (this town had its name from a fountain in the neighborhood, Serv. ad Verg. A. 7, 799; Vitr. 27, 38.)
    Hence,
  2. II. Derivv.
    1. A. Anxŭrus: Juppiter, who was worshipped at Anxur, Verg. A. 7, 799; v. Serv. ad h. l.
    2. B. Anxŭras, ātis, m., belonging to Anxur, Liv. 27, 38.