diagram
Pronunciation: /ˈdʌɪəɡram/
noun
1A simplified drawing showing the appearance, structure, or workings of something; a schematic representation: a diagram of the living room
1.1 Geometry A figure composed of lines that is used to illustrate a definition or statement or to aid in the proof of a proposition.
1.2 British A graphical schedule for operating railway locomotives and rolling stock in order to provide a desired service.
verb (diagrams, diagramming, diagrammed; US diagrams, diagraming, diagramed)
[with object]
1 Represent (something) in graphic form: the experiment is diagrammed on page fourteen
1.1 British Schedule the operations of (a locomotive or train) according to a diagram.
Origin
Early 17th century: from Latin diagramma, from Greek, from diagraphein 'mark out by lines', from dia 'through' + graphein 'write'.
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As shown in
diagram 1 a typical wood screw has a shank above the threads. The shank is designed to slide through the top piece of material, letting the threads below cut into the bottom piece pulling the angled head into the top layer, drawing it tight against the bottom piece.
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