Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fēlīnus, a, um, adj. [feles], of or belonging to a cat: stercus, Cels. 5, 18, 15 dub. (Targa: suillum).
Another form, fē-līnĕus, a, um: oculi, Serv. Verg. G. 3, 82.