1. an instrument with two hinged legs used for measuring the thickness, diameter, or distance between surfaces
Usage: British spelling; American spelling is ‘caliper’

Examples

• The machinist used callipers to measure the pipe’s diameter.
• She adjusted the callipers to check the thickness of the metal sheet.
• The engineer’s callipers showed the bolt was exactly 10 millimeters wide.
• Digital callipers provide more precise measurements than traditional ones.
• He kept his callipers in a protective case to prevent damage.
• The jeweler used fine callipers to measure the gemstone’s dimensions.