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Meaning of protractor

pro•trac•tor

Pronunciation: (prō-trak'tur, pru-), [key]
— n.
  1. a person or thing that protracts.
  2. (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles.
  3. a muscle that causes a part to protrude.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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