Definition - What does Micron mean?

A Micron, also known as micrometer, is a standard measuring unit of length, which is 1 millionth of a meter. It is used unofficially to refer to the SI base unit for the length in a meter. There are 1000000 microns in 1 meter. Micrometer is the international spelling and far more used term for micron by the International Bureau of Weights and Measures. The SI symbol for micron is µm and 1 micron has different metric values in other units.

Petropedia explains Micron

Micron is the common name of micrometer. It is denoted by the SI symbol µm and it is the standardized measurement unit of length of a meter. A meter is the basic unit of length, denoted by symbol m. There are SI metric prefixes of meter, which helps in denoting the meter's multiple and submultiples. These prefixes help in segregating the distance in meter into other units. One such unit is micron, which is also very rarely called a millimicron. The value of 1 micrometer is 10-6 m.

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