Lewis & Short

Tŏmis, is, f., or Tŏmi, ōrum, m., = Τόμις or Τόμοι, a town of Mœsia, on the Pontus Euxinus, famous as the place to which Ovid was banished.
Form Tomis, Ov. P. 4, 14, 59; id. Tr. 3, 9, 33.
Form Tŏmi, ōrum, m., Stat. S. 1, 2, 254; Claud. Epith. Pall. et Celer. 70; Sid. Carm. 23, 159.
And after the Greek orthog., Tŏmoe, Mel. 2, 2, 5.
Hence,

  1. A. Tŏmītae, ārum, m., the inhabitants of Tomis, Ov. Tr. 1, 2, 85.
  2. B. Tŏmītānus, a, um, adj., of or belonging to Tomis, Tomitan: terra, Ov. P. 1, 1, 1: harena, id. ib. 1, 6, 49: nurus, id. ib. 3, 8, 10.