Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nyctĕlĭus, a, um, adj., = Νυκτέλιος, an epithet of Bacchus, because his mysteries were celebrated at night: Nyctelius pater, Ov. A. A. 1, 567: latex, wine, Sen. Oedip. 492: Nyctelia sacra, the Bacchanalia, Serv. ad Verg. A. 4, 383