
instrument for enlarging or projecting drawings
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http://phrontistery.info/d.html

• (n.) A drawing instrument, combining a protractor and scale.
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http://thinkexist.com/dictionary/meaning/diagraph/
Di'a·graph noun [ Greek ... to draw: confer French
diagraphe . See
Diagram .] A drawing instrument, combining a protractor and scale.
Found on
http://www.encyclo.co.uk/webster/D/57

diagraphy, diagraph 1. An instrument used for drawing mechanically projections of objects, enlarged copies of maps, etc.; it consists of a pencil governed by cords and pulleys, and guided by the application of a pointer to the object to be copied. 2. A combined protractor and scale used in plotting. 3. A combination of two letters to express a simp...
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http://www.wordinfo.info/words/index/info/view_unit/2724/21

a device for drawing, used in reproducing outlines, plans, etc., mechanically on any desired scale. · a combined protractor and scale.
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https://www.infoplease.com/dictionary/diagraph
No exact match found.