diagraph

diagraph

[dahy-uh-graf, -grahf]
noun
1.
a device for drawing, used in reproducing outlines, plans, etc., mechanically on any desired scale.
2.
a combined protractor and scale.

Origin:
1840–50; < French diagraphe < Greek diagráphein to draw. See dia-, -graph

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World English Dictionary
diagraph (ˈdaɪəˌɡrɑːf, -ˌɡræf)
 
n
1.  a device for enlarging or reducing maps, plans, etc
2.  a protractor and scale used in drawing
 
[C19: from French diagraphe, from Greek diagraphein to represent with lines; see diagram]

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