protractor

[ proh-trak-ter, pruh- ]
/ proʊˈtræk tər, prə- /
|

noun

a person or thing that protracts.
(in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles.
Anatomy. a muscle that causes a part to protrude.

Nearby words

  1. protozoophage,
  2. protract,
  3. protracted,
  4. protractile,
  5. protraction,
  6. protriptyline,
  7. protrude,
  8. protruded disk,
  9. protrusile,
  10. protrusion

Origin of protractor

From Medieval Latin, dating back to 1605–15; see origin at protract, -tor

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for protractor


British Dictionary definitions for protractor

protractor

/ (prəˈtræktə) /

noun

an instrument for measuring or drawing angles on paper, usually a flat semicircular transparent plastic sheet graduated in degrees
a person or thing that protracts
a surgical instrument for removing a bullet from the body
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

Word Origin and History for protractor

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

Medicine definitions for protractor

protractor

[ prō-trăktər ]

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.