Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Cis-alpīnus, a, um, adj., lying on this side of the Alps, Cisalpine (very freq.): Gallia, Cic. Imp. Pomp. 12, 35; Caes. B. G. 6, 1: Galli, Liv. 27, 38, 6: provincia, Suet. Caes. 29.