Lewis & Short

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Ărĕthūsa, ae, f., = Ἀρέθουσα.

      1. 1. A celebrated fountain near Syracuse, Cic. Verr. 2, 4, 53; acc. to the fable, a nymph in the train of Diana, in Elis, pursued by the river-god Alpheus, fled to Sicily, Ov. M. 5, 573 (cf. Pausan. 5, 7); hence it was believed that it flowed under the sea with the Alpheus, and appeared again in Sicily, Verg. E. 10, 4 sqq.; id. A. 3, 694; Plin. 2, 103, 106, § 225; 31, 5, 30, § 55; cf. Mann. Ital. II. 325, and Alpheus.
      2. 2. A fountain in Eubœa, Plin. 4, 12, 21, § 64.
      3. 3. A fountain in Bœotia, Plin. 4, 12, 21, § 64.
      4. 4. A lake in Armenia Major, Plin. 2, 103, 106, § 226 (Jan, Aritissa).
      5. 5. A town in Macedonia, Plin. 4, 10, 17, § 38.
      6. 6. A town in Syria, on the Orontes, now Rustan or Restun, Itin. Anton.
  1. II. Derivv.
    1. A. Ărĕthūsaeus, a, um, adj., of or pertaining to the fountain Arethusa (in Sicily), Arethusian, Claud. Rapt. Pros. 2, 60.
    2. B. Ărĕthūsis, ĭdis, adj., Arethusian, a poet. epithet for Syracuse, near which was the fountain Arethusa, Ov. F. 4, 873 (cf. id. ib. 5, 7: Aganippis Hippocrene).
    3. C. Ărĕthūsĭus, a, um, adj.
      1. 1. Arethusian; hence poet. for Syracusan: proles, Sil. 14, 356.
      2. 2. Subst.: Ărĕthūsĭi, ōrum, m.
        1. a. The inhabitants of Arethusa, in Macedonia, Plin. 4, 10, 17, § 35.
        2. b. The inhabitants of Arethusa, in Syria, Plin. 5, 23, 19, § 82.