goniometer
nounUK /ˌɡəʊniˈɒmɪtə/
US /ˌɡoʊniˈɑːmɪtər/
A goniometer is a tool that measures angles.
The doctor used a goniometer to check how far I could bend my knee.
RELATED WORDS
OTHER MEANINGS
2. A device used in physical therapy to measure the range of motion of a joint.
The therapist recorded the shoulder's range of motion with a goniometer.
3. An instrument for measuring the angles between crystal faces.
The geologist examined the crystal using a goniometer.
4. A radio-direction-finding instrument that determines the direction of incoming signals.
The ship's goniometer helped the crew locate the distress signal.