follow Dictionary.com

Denotation vs. Connotation

protractor

[proh-trak-ter, pruh-] /proʊˈtræk tər, prə-/
noun
1.
a person or thing that protracts.
2.
(in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles.
3.
Anatomy. a muscle that causes a part to protrude.
Origin of protractor
1605-1615
1605-15; < Medieval Latin; see protract, -tor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for protractor
Historical Examples
  • One point of the compass is placed at the center of the protractor and an elastic band is looped between the points.

  • He was using a protractor, which was divided into Galactic degrees.

    The Players Everett B. Cole
  • It is also fairly accurate to run a line at any angle to a given line by sighting along two pins stuck in a protractor.

    The Teaching of Geometry David Eugene Smith
  • protractor: that which extends or lengthens out: applied to muscles.

  • The protractor has a graduated disk, and is adjustable so it can be disposed at any angle.

  • At that point find, by means of a protractor, the angle a projection of the chord makes with the face of the beam.

  • A line is then drawn from A to the point marked and the angle F is measured with a protractor.

  • Then, if we have a protractor, we may apply it to the lines and see how many degrees of angle they contain.

  • Off and on I try and keep up my Euclid and do a rider over my lunch, and I just keep a protractor handy.

    The Judge Rebecca West
  • The student should have and use a protractor, such as is furnished with this book, for the numerous exercises which are to follow.

    A Text-Book of Astronomy George C. Comstock
British Dictionary definitions for protractor

protractor

/prəˈtræktə/
noun
1.
an instrument for measuring or drawing angles on paper, usually a flat semicircular transparent plastic sheet graduated in degrees
2.
a person or thing that protracts
3.
a surgical instrument for removing a bullet from the body
4.
(anatomy) a former term for extensor
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
Cite This Source
Word Origin and History for protractor
n.

1610s, "one who lengthens (an action)," from Medieval Latin protractor, agent noun from Latin protrahere "to draw forward" (see protraction); sense of "instrument for drawing angles" first recorded 1650s.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
protractor in Medicine

protractor pro·trac·tor (prō-trāk'tər, prə-)
n.
A muscle that extends a limb or other part.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for protractor

Some English speakers likely know this word

Word Value for protractor

14
16
Scrabble Words With Friends

Nearby words for protractor