Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† 1. luxus, a, um, adj. [= Gr. λοξός; v. luxo], dislocated: luxum si quod est, Cato, R. R. 160: luxo pede, Sall. Fragm. ap. Prob. p. 1476 P. (Hist. 5, 2); cf.: luxa membra e suis locis mota et soluta, Paul. ex Fest. p. 119, 17 Müll.
Subst.: luxum, i, n., a dislocation: emplastrum utile ad luxa, vel fracta, Marc. Emp. 36.
2. luxus, ūs, m. [1. luxus], a dislocation (ante- and post-class.): ad luxum aut fracturam alliga: sanum fiet, Cato, R. R. 160; App. Flor. p. 354 med.; Plin. Val. 2, 49.