protractor

noun5

1. •
   A circular or semicircular tool for drawing or measuring angles.

   • Use a protractor to measure the angle accurately.
   • The student forgot to bring her protractor to geometry class.
2. •
   One who, or that which, protracts, or causes protraction.
3. •
   A muscle that extends an organ or part; opposed to retractor.
4. •
   An adjustable pattern used by tailors.
5. •
   An instrument formerly used in extracting foreign or offensive matter from a wound.