. | 1. | Also called micrometer. the millionth part of a meter. Symbol: μ, mu |
| 2. | Physical Chemistry. a colloidal particle whose diameter is between 0.2 and 10 microns. |
| 3. | Physics. a very small unit of pressure, equal to that exerted by a column of mercury 1μ high. |
micron mi·cron or mi·kron (mī'krŏn')
n. pl. mi·crons or mi·cra (-krə) or mi·krons or mi·kra (-krə)
Abbr. μm See micrometer.
Micron
Micron Electronics, Inc.
micron
micrometre
micron
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.
Learn more about micron with a free trial on Britannica.com.