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micrometer mi·crom·e·ter1 (mī-krŏm'ĭ-tər)
A device for measuring very small distances, objects, or angles, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.
micrometer mi·cro·me·ter2 (mī'krō-mē'tər)
Abbr. μm A unit of length equal to one thousandth (10-3) of a millimeter or one millionth (10-6) of a meter. Also called micron.
|micrometer 1 |
A device for measuring very small distances, angles, or objects, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.
metric unit of measure for length equal to 0.00l mm, or about 0.000039 inch. Its symbol is mum. The micrometre is commonly employed to measure the thickness or diameter of microscopic objects, such as microorganisms and colloidal particles. Minute distances, as, for example, the wavelengths of infrared radiation, are also given in micrometres.