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Related to vernier caliper: micrometer caliper
A measuring instrument consisting of an L-shaped frame with a linear scale along its longer arm and an L-shaped sliding attachment with a vernier, used to read directly the dimension of an object represented by the separation between the inner or outer edges of the two shorter arms.
a caliper formed of two pieces sliding across one another, one having a graduated scale and the other a vernier. Also called ver′nier microm`eter.