Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rŭbĭdus, a, um, adj. [rubeo], red, reddish, dark-red (rare), cf. Gell. 2, 26, 8 sq.; 14: ampulla, Plaut. Stich. 1, 3, 77: panis, id. Cas 2, 5, 2; cf. Fest. pp. 262 and 263 Müll.: facies ex vinolentiā, Suet. Vit. 17.