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.

Trāchīn, īnis, or Trāchȳn, ȳnos, f., = Τραχίν or Τραχύν, a town of Thessaly, on Mount Œta, where Hercules caused himself to be burned, Plin. 4, 7, 14, § 28; Sen. Herc. Oet. 135; 195; 1432; id. Troad. 818; Ov. M. 11, 627.
Hence, Trāchīnĭus, a, um, adj., of or belonging to Trachin, Trachinian: tellus, Ov. M. 11, 269: miles, Luc. 3, 177: heros, i. e. Ceyx, king of Trachin, Ov. M. 11, 351; called also, absol., Trachinius, id. ib. 11, 282; cf. puppis, the vessel in which Ceyx was shipwrecked, id. ib. 11, 502: herba, Plin. 27, 13, 114, § 141: rosa, id. 21, 4, 10, § 16: Halcyone, the consort of Ceyx, Stat. S. 3, 5, 57.
In plur. subst.: Trāchīnĭae, ārum, f., The Trachinian Women, a tragedy of Sophocles, Cic. Tusc. 2, 8, 20.