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protractor

[ proh-trak-ter, pruh- ]

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.


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


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Word History and Origins

Origin of protractor1

From Medieval Latin, dating back to 1605–15; protract, -tor
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Example Sentences

It contains a front pocket with an organizer for pens, pencils, and protractors, and its main compartment can hold textbooks and binders.

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

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

Rule another line along the same edge of the board as before and with a protractor measure the angle between these lines.

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

No witness could tell more truth than the compass and protractor of Mr. Smith which were free from prejudice and partiality.

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