protractor
/prəˈtræktər/
noun
- A tool used for measuring and drawing angles, usually a half-circle or full circle made of clear plastic.
- I always keep a protractor in my pencil case for geometry class.
- The teacher handed out protractors so everyone could draw a 45-degree angle.
- She used a protractor to measure the angle of the triangle in her math homework.
- A muscle that extends or stretches a body part outward.
- The protractor muscle helps the fish extend its fins.
- Certain exercises strengthen the protractor muscles in your shoulders.
- In anatomy class, we studied how the protractor moves the jaw forward.