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straightedge

[streyt-ej] /ˈstreɪtˌɛdʒ/
noun
1.
a bar or strip of wood, plastic, or metal having at least one long edge of sufficiently reliable straightness for use in drawing or testing straight lines, plane surfaces, etc.
Origin of straightedge
1805-1815
1805-15; straight + edge

straight-edge

[streyt-ej] /ˈstreɪtˌɛdʒ/
adjective
1.
advocating abstinence from alcohol, cigarettes, drugs, and sex and sometimes advocating vegetarianism.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for straightedge
Historical Examples
  • The first requisite for this is a straightedge of iron or brass, as true as possible.

    The Invention of Lithography Alois Senefelder
  • It is necessary also that the straightedge be applied frequently.

    The Invention of Lithography Alois Senefelder
  • The straightedge and the compasses are the only two drawing instruments recognized in elementary geometry.

    The Teaching of Geometry David Eugene Smith
  • The cutter is guided along the straightedge as shown in Fig. 1.

  • This, like Postulate 1, requires the use of a straightedge for drawing the physical figure.

    The Teaching of Geometry David Eugene Smith
  • In other words, the trisection of any angle, by the use of the straightedge and compasses alone, is impossible.

    The Teaching of Geometry David Eugene Smith
British Dictionary definitions for straightedge

straightedge

/ˈstreɪtˌɛdʒ/
noun
1.
a stiff strip of wood or metal that has one edge straight and true and is used for ruling and testing straight lines
Derived Forms
straightedged, adjective

straight-edge

adjective
1.
(informal) not indulging in any kind of drug-taking or sexual activities
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
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Slang definitions & phrases for straightedge

straight and narrow

noun phrase

Conventionally moral and law-abiding behavior (1930+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Difficulty index for straightedge

Few English speakers likely know this word

Word Value for straightedge

0
19
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