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diagraph

American  
[dahy-uh-graf, -grahf] / ˈdaɪ əˌgræf, -ˌgrɑf /

noun

  1. a device for drawing, used in reproducing outlines, plans, etc., mechanically on any desired scale.

  2. a combined protractor and scale.

diagraph British  
/ -ˌɡræf, ˈdaɪəˌɡrɑːf /

noun

  1. a device for enlarging or reducing maps, plans, etc

  2. a protractor and scale used in drawing

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of diagraph

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.