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A micrometer is a hand-held measuring instrument using a screw-based mechanism. The word micrometer is believed to have originated in Greece, the Greek meaning for this word being small. The first ever micrometer screw was invented by William Gascoigne of Yorkshire in the 17th century. It was used in telescopes to measure angular distances between stars. A micrometer has a long history in metrological applications. It is a versatile measuring instrument and can be used for various applications by simply changing the anvil and the spindle face.
