Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† pălĭūrus, i, m., = παλίουρος, a plant, Christ’s-thorn, Verg. E. 5, 39; cf. Plin. 24, 13, 71, § 115; 16, 30, 53, § 121; Vulg. Isa. 34, 13.