Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Trĭphȳlĭa, ae, f., a name of the southern portion of Elis, Liv. 28, 8; 32, 5; 33, 34.
Hence, Trĭphȳlĭus, a, um, adj., Triphylian: Jupiter, Lact. 1, 11, 33.