Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

Ostĭa, ae, f., and Ostĭa, ōrum, n. [ostium; cf. Engl. mouth, in Ply-mouth, Yar-mouth, etc.],

  1. I. a seaport town in Latium, at the mouth of the Tiber, built by Ancus Marcius, still called Ostia: Ostiam urbem ad exitum Tiberis in mare fluentis Ancus Marcius rex condidisse fertur, Paul. ex Fest. p. 197 Müll.; cf.: urbs, quam secundum ostium Tiberis (Ancus Marcius) posuit, ex quo etiam Ostiam. id. s. v. Quiritium, p. 254 ib.; Enn. ap. Paul. ex Fest. s. v. quaeso, p. 258 ib. (Ann. v. 145 Vahl.): in ore Tiberis Ostia urbs condita, Liv. 1, 33 fin.; Cic. Rep. 2, 3, 5.
    Form Ostia, ōrum, Liv. 9, 19, 4; 23, 37, 1.
  2. II. Ostĭen-sis, e, adj., of or belonging to Ostia, Ostian (class.): Ostiensis ager, Cic. Att. 12, 23, 3; Liv. 8, 12: populus, id. 27, 38: quaestor (L. Saturninus), Cic. Sest. 17, 39: portus, Plin. 9, 6, 5, § 14: provincia, the duty of one of the quœstors to superintend the aqueducts leading to Rome, and the supplying of Rome with corn, Cic. Mur. 8, 18; Suet. Claud. 24: incommodum, the capture of the Roman fleet by pirates at Ostia, Cic. Imp. Pomp. 12, 33.