symbols, acronyms & abbreviations
micrometer: micro- + meter, a millionth of a meter. Used without a period. A symbol in SI, the International System of Units.
Barry N. Taylor and Ambler Thompson, editors.
The International System of Units (SI)
NIST Special Publication 330, 2008 Edition.
“United States version of the English text of the eighth edition (2006) of the International Bureau of Weights and Measures publication Le Système International d’ Unités (SI)” This publication is the definitive guide for the United States, but the ultimate authority is the original, French version. See Section 2.1.2 and table 1, page 9.
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Last revised: 7 November 2015.