[{"Bold_text": "noun", "List Items": ["Alsover?nier scale?.a small, movable, graduated scale running parallel to the fixed graduated scale of a sextant, theodolite, barometer, etc., and used for measuring a fractional part of one of the divisions of the fixed scale.", "Machinery.an auxiliary device for giving a piece of apparatus a higher adjustment accuracy."]}, {"Bold_text": "adjective", "List Items": ["equipped with a vernier:a vernier barometer."]}, {"Bold_text": "noun", "List Items": ["Pierre[pye, r],1580–1637,French mathematician and inventor."]}]