monstratio

monstrātĭo, ōnis, f. [monstro],

a showing, direction (only in Terence and Vitruv.): defessus sum ambulando: ut, Syre, te cum tuā Monstratione magnus perdat Juppiter, direction , Ter. Ad. 713: solers et expedita monstratio, indication, hint , Vitr. 6, 1, 12.