DIAGRAM: (noun) A drawing intended to explain how something works; a drawing showing the relation between the parts. (verb) Make a schematic or technical drawing of that shows how things work or how they are constructed.
R. A. MATULA. “ELECTRICAL RESISTIVITY OF COPPER, GOLD, PALLADIUM AND SILVER” 1979. Layers of data are superimposed to result in a connected curve whose overall diagram can be compared with the standard.