Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. Bacis, ĭdis, m. (Βάκις, ιδος, Pausan.), a soothsayer of Bœotia, Cic. Div. 1, 18, 34.
2. Bacis (Bacchis, Pacis), acc. Bacem, a sacred bull, worshipped at Hermonthis in Upper Egypt, Macr. S. 1, 21.