micrometer
/ˈmaɪkɹəʊmiːtə//ˈmaɪkɹoʊmiːtɚ/
noun
- 1
An SI/MKS unit of measure, the length of one millionth of a meter. Symbols: µm, um, rm.
Synonyms
noun
- 1
A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter.
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