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protractor Definition

pro·trac·tor (prō′trak′tər, prō trak′-)

noun

  1. a person or thing that protracts
  2. an instrument in the form of a graduated semicircle, used for plotting and measuring angles
  3. Anat. a muscle that protracts, or extends, a limb

Etymology: ML

protractor Usage Examples

Converse of object

  • use: Using a protractor, draw a line for the back azimuth on the map from the known position back toward your unknown position.
  • place: Place a protractor behind it so that the pin ( P ) passes over the scale on the protractor.

Preposition: on

  • map: However, it should be noted that when using the protractor on a map, only grid azimuths are obtained.

Modifies a noun

  • quadrant: Punch a tiny hole in the apex of the protractor quadrant.

Noun used with modifier

  • resector: Stores 4. One resector protractor, map and mapboard per student.