Micrometre
/maɪˈkrɑmətər/
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Definition
(noun) An SI and mks unit of measure, the length of one-millionth of a metre. Symbol: μm, um, μ.
Sentence Examples
The micrometre was used for measurement.
The length was measured in micrometres.
CEFR Practice Quiz
In many scientific fields, a thousandth of a millimeter is referred to as a ____ or more simply as a micron.