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Related to calipers: brake calipers, Digital calipers
left to right: spring and inside
cal·i·peralso cal·li·per (kăl′ə-pər)
1. often calipers An instrument consisting of two hinged legs, used to measure thickness and distances.
2. A large instrument having a fixed and a movable arm on a graduated stock, used for measuring the diameters of logs and similar objects.
3. A vernier caliper.
a. The assembly housing the brake pads in a disc brake.
b. The assembly in certain bicycle brakes that forces the brake pads against the wheel rim.
[Alteration of caliber.]