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Definition of Micrometre
1. Noun. An SI/MKS unit of measure, the length of one one-millionth of a metre. Symbol: µm, um, rm ¹
¹ Source: wiktionary.com
Medical Definition of Micrometre
1. One-millionth of a metre, or ten to the minus sixth metre (abbreviated um), the unit used for measuring microorganisms. (09 Oct 1997)
Lexicographical Neighbors of Micrometre
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