Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fūsōrĭum, ii, n. [fundo], a sink, drain, Pall. 1, 17, 1; 1, 37, 4.
fūsōrĭus, a, um, adj. [fundo], molten, made by founding: fusorius, χωνευτικός, Gloss. Philox.: opere fusorio, by casting, Vulg. Exod. 32, 4.