INTESTI´NUM 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).
A Dictionary of Greek and Roman Antiquities. William Smith, LLD. William Wayte. G. E. Marindin. Albemarle Street, London. John Murray. 1890.