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.

Constantĭus, ii, m., the name of a Roman emperor who reigned from 292 A. D. to 306 A. D., Eutr. 10, 6 sqq.; Lact. Mort. Pers. 15, 6; Aur. Vict. Caes. 40.
Hence, the adjj.: Constantĭăcus, a, um: legiones, Amm. 21, 11, 2: Constantĭānus, a, um: thalamus, id. 22, 3, 12; and Constantĭ-ensis, e, of or pertaining to Constantius: bellum, Sext. Ruf. Brev. 27.