Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ĕquīnus, a, um, adj. [equus], of or belonging to horses: pecus, Varr. R. R. 2, 7, 7; cf. genus, Col. 6, 27, 1: lac, Varr. R. R. 2, 11, 1: stercus, id. ib. 1, 38, 3 al.: cervix, Hor. A. P. 1: cauda, id. Ep. 2, 1, 45: ubera, id. Epod. 8, 8: pedes, Plin. 4, 13, 27, § 95: seta, * Cic. Tusc. 5, 21, 62: emptio (i. e. equorum), Varr. R. R. 2, 7, 6: pullus, Vulg. Sir. 23, 30.