Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
russĕus, a, um, adj. [russus], reddish (postAug. and very rare): tunica, Petr. 27, 1: fasciola, App. M. 2, 117: color, Pall. Mart. 13, 4: pannus, Plin. 21, 23, 94, § 166; 29, 4, 17, § 64; 30, 11, 30, § 99.