A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for accurate measurement of components in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.

What is meant micrometer?

Micrometre, also called micron, metric unit of measure for length equal to 0.001 mm, or about 0.000039 inch. ... The micrometre is commonly employed to measure the thickness or diameter of microscopic objects, such as microorganisms and colloidal particles.

What is micrometer in short?

1 : an instrument used with a telescope or microscope for measuring minute distances. 2 : a caliper for making precise measurements that has a spindle moved by a finely threaded screw.