symbols, acronyms & abbreviations

µm

micrometer: micro- + meter. Used without a period. A symbol in SI, the International System of Units.

Barry N. Taylor, ed.
The International System of Units (SI) pdf logo
NIST Special Publication 330, 2001 Edition.

The United States version of the English text of the seventh edition (1998) of the International Bureau of Weights and Measures publication Le Système International d’Unités (SI), including Supplément 2000: additions et corrections à la 7e édition (1998) See Section 2.1.2 and table 1, page 9.

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