Dictionary.com
Thesaurus.com

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It happens that the most frequent English vowel diagraph is ea.

From Time Magazine Archive

This is the usual behavior of plaintext h: the diagraph he is commonplace, but eh is unusual; th is the most frequent diagraph of all, but ht less so.

From Time Magazine Archive

In the orthography of the Félibres the diagraph ue is used as we find it in Old French to represent this vowel.

From Frédéric Mistral Poet and Leader in Provence by Downer, Charles Alfred

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.