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Instrument for making precise linear measurements of dimensions such as diameters, thicknesses, and lengths of solid bodies. It consists of a C-shaped frame with a movable jaw operated by a screw. The accuracy of the measurements depends on the accuracy of the screw-nut combination.
This entry comes from Encyclopædia Britannica Concise. For the full entry on micrometer (caliper), visit Britannica.com.
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