Translation guide
A unit of length equal to one millionth of a meter, commonly used in science and engineering. In Japanese, the term ミクロン was historically used, but the official SI term is now マイクロメートル.
micron (unit of length)
Official SI term; preferred in modern technical contexts.
micron (historical term)
Older term, still understood but being phased out.
Express the measurement 'micron' in a scientific or technical context.
a particle size of 10 microns · measured in microns
The modern standard term for micron, used in all formal and technical writing. Symbol: μm.
The pore size of this filter is 0.5 microns.
The older term for micron, still encountered in some industries or older texts. Not recommended for new technical documents.
Use マイクロメートル in modern scientific contexts; ミクロン may sound outdated.
In the past, the unit 'micron' was often used.
Both refer to the same length (1 μm). マイクロメートル is the official SI term and should be used in academic, industrial, and formal settings. ミクロン is a legacy term that may still appear in older equipment manuals or casual conversation among engineers, but it is being phased out.