[{"Bold_text": "noun", "List Items": ["Usuallycalipers.an instrument for measuring thicknesses and internal or external diameters inaccessible to a scale, consisting usually of a pair of adjustable pivoted legs.", "any of various calibrated instruments for measuring thicknesses or distances between surfaces, usually having a screwed or sliding adjustable piece.Compare vernier caliper vernier caliper.", "thickness or depth, as of paper or a tree.", "Usuallycalipers.the pincers of an earwig.", "Automotive.the part of a disc-brake assembly that straddles the disc and presses the brake pads against it.", "a similar part used with a hand brake on a bicycle."]}, {"Bold_text": "verb (used with object)", "List Items": ["to measure with calipers."]}, {"Bold_text": "verb (used without object)", "List Items": ["to use calipers."]}]