goniometer
/ˌɡoʊniˈɑmɪtər/
noun
- An instrument used to measure angles, especially in geometry, medicine, or physics.
- The carpenter carefully set the goniometer to check the corner of the frame.
- The doctor used a goniometer to measure the range of motion in my injured knee.
- In the physics lab, we used a goniometer to find the angle of the light beam.
Synonyms