Micrometer can mean:
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Micrometer (device)
A micrometer, sometimes known as a micrometer screw gauge (MSG), is a device incorporating a calibrated screw for Accuracy and precision, accurate measurement of the size of components. It widely used in mechanical engineering, machining, metro ...
, used for accurate measurements by means of a calibrated screw
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Micrometre
The micrometre (English in the Commonwealth of Nations, Commonwealth English as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a uni ...
, a millionth of a metre
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