Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
mūrīnus, a, um, adj. [mus], of mice, mouse- (ante-class. and post-Aug.): murinus color, mouse-color, Varr. ap. Non. 8, 2; Col. 6, 37, 6; Pall. 4, 13, 4: equus, Varr. Sat. Men. 63, 13: sanguis, Plin. 30, 9, 23, § 81: fimus, id. 29, 6, 34, § 106: pellis, id. 29, 6, 36, § 113: pelles, the skins of martens, ermines, etc., Just. 2, 2, 9: hordeum, a kind of wild barley, Plin. 22, 25, 65, § 135.