TROSMIS(Τροσμίς, Hierocl. p. 637; Τρισμίςor Τροισμίς, Ptol. 3.10.11), a town of some importance in Lower Moesia, on the Danube, where, according to the Itin. Ant. (p. 225), the Legio I. Jovia had its head quarters, though the Not. Imp. (100.28) more correctly mentions the Legio II. Herculea. Lapie identifies it with Matchin. (Cf. Ovid, ex Pont. 4.9, 5.79.)
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