Lewis & Short

Rōma, ae, f., = Ῥώμη, the city of Rome, founded in the second year of the seventh Olympiad (B. C. 753), Cic. Rep. 1, 37, 58; 2, 10, 18; worshipped as a goddess in a particular temple, Liv. 43, 6; Tac. A. 4, 37; Suet. Aug. 52; cf.: Roma ferox, Hor. C. 3, 3, 44: princeps urbium, id. ib. 4, 3, 13: ROMAE AETERNAE, Inscr. Orell. 1762; 1776; 1799: ROMAE ET AVGVSTO, ib. 606.
Hence,

  1. A. Rōmānus, a, um, adj., of or belonging to Rome, Roman: forum, v. h. v.: populus Romanus (always in this order; abbreviated P. R.); v. populus: Juno, the Roman (opp. Argiva), Cic. N. D. 1, 29, 82: lingua Romana, i. e. Latin, Laurea Tull. poët. ap. Plin. 31, 2, 3, § 8; Tac. Agr. 21; Plin. Ep. 2, 10, 2; Vell. 2, 110: Romana lingua, Macr. S. 1, praef. § 2; Lact. 3, 13, 10; Treb. Poll. Trig. Tyr. 28, 2; Aug. Ep. 167, 6: litterae Romanae (= litterae Latinae), Quint. 1, 10, 23: sermo Romanus, id. 2, 14, 1; 6, 2, 8; 10, 1, 100; 123: auctores. id. 10, 1, 85; Front. ad Ver. Imp. p. 125: ludi, also called ludi magni, the most ancient in Rome, annually celebrated on the 4th of September, Cic. Verr. 2, 5, 14, § 36; Liv. 1, 35 fin.; 28, 10; 29, 38 fin. et saep.: Romano more, in the Roman manner, plainly, openly, candidly, frankly, Cic. Fam. 7, 5, 3; 7, 18, 3; 7, 16, 3.
    As subst.: Rōmānus, i, m.
      1. a. Sing. collect., = the Romans, Liv. 2, 27, 1; 8, 3, 1.
      2. b. The Roman (sc. imperator), Liv. 21, 59, 5: Romanus sedendo vincit (cf. Q. Fabius Maximus), Varr. R. R. 1, 2, 2.
      3. c. Plur.: Romani, the Romans, Liv. 1, 25, 9; 13 et saep.
        Adv.: Rōmānē, in the Roman manner, plainly, candidly, frankly, etc., Gell. 13, 21, 2.
        Hence, Rōmānĭtas, ātis, f., Romanism, the Roman way or manner, Tert. Pall. 4.
  2. B. Rōmānĭcus, a, um, adj., Roman: aratra, juga, i. e. made in Rome, Cato, R. R. 135, 2: fiscinae, id. ib. 135, 2, § 3.
  3. C. Rō-mānĭensis, e, adj., of Rome, Roman: sal, Cato, R. R. 162.
    Collat. form Rōmānen-ses, Paul. ex Fest. s. v. Corinthienses, p. 61, 1 Müll.
  4. D. Rōmānŭlus, a, um, adj. dim., of Rome, Roman: Porta, Varr. L. L 5, § 164 Müll.
  5. E. Rōmŭlĭus or Rō-mĭlĭus, a, um, adj., of Rome, Roman: tribus, Varr. L. L. 5, § 56 Müll.; Fest. pp. 270 and 271 ib.; Cic. Agr. 2, 29, 79.