Blueprint, for instance (7)
I believe the answer is:
diagram
(Other definitions for diagram that I've seen before include "Explanatory illustration" , "Drawing to show how things work" , "Explatory drawing" , "Explanatory figure" , "scheme" .)
I believe the answer is:
diagram
(Other definitions for diagram that I've seen before include "Explanatory illustration" , "Drawing to show how things work" , "Explatory drawing" , "Explanatory figure" , "scheme" .)