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.

Ventĭdĭus, i, m., the name of a Roman gens; so P. Ventidius Bassus, a partisan of Antony, Cic. Phil. 12, 9, 23; 13, 11, 26; 13, 21, 48; 14, 7, 21; Planc. ap. Cic. Fam. 10, 18, 3; Gell. 15, 4.
Hence, adj.: Ventĭdĭā-nus, a, um, Ventidian, of Ventidius: milites, Brut. ap. Cic. Fam. 11, 13, 3: rumores, Cic. Fragm. ap. Non. 92, 21.