Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ex-albĭdus, a, um, adj., whitish, white (repeatedly in Pliny): rami (arboris), Plin. 12, 17, 39, § 78: folia urticae, id. 24, 19, 112, § 172: vina, id. 23, 1, 22, § 40.