Intestinum opus
Intestinum opus joiner's work, is referred to in some passages of Vitruvius as used in the interior of buildings; but there is nothing in his allusions to it that requires explanation (Vitr. 2.9; 5.2 and 3).
From William Smith (ed.), Dictionary of Greek and Roman Antiquities. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.