Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
scriptōrĭus, a, um, adj. [scribo], of or belonging to writing, writing-: atramentum, Cels. 6, 4 fin.; 8, 4: calamus, id. 5, 28, 12.
Subst.: scriptōrĭum, ii, n., = γραφίον, a metallic style for writing on wax tablets, Isid. 6, 9, 2.