caliper
nounUK /ˈkæl.ɪ.pər/
US /ˈkæl.ə.pɚ/
A caliper is a tool that measures how thick or wide something is.
The mechanic used a caliper to measure the brake disc.
RELATED WORDS
OTHER MEANINGS
2. One of the two curved parts of a tool used for measuring distances, like a compass.
He adjusted the calipers to match the width of the pipe.
3. A part of a bicycle or car brake that presses against the wheel to slow it down.
The bike's front caliper needed new brake pads.
4. A device with two adjustable jaws used to measure inner or outer dimensions.
She used a vernier caliper to check the metal rod's diameter.