Micro-

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Micro- (µ) is a prefix in the SI and other systems of units denoting a factor of 10⁻⁶ (one millionth).^[1] Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small".

The symbol for it is the micro sign µ, the Greek letter mu (μ). For historical reasons, these are two different characters in Unicode, which appear slightly different in some fonts. The micro sign is encoded in the "Latin-1 Supplement" range identical to ISO/IEC 8859-1 (since 1985), at U+00B5 (Unicode 1.0, 1991). The Greek letter is encoded in the Greek range at U+03BC.

In circumstances where only the Latin alphabet is available, the prefix is sometimes represented using the letter u as in "um" for µm, or "uV" for µV. In some contexts, such as pharmacy, micrograms are often written mcg. Neither variant is standard.

Template:SI prefix

References

See also

• micrometre
• square micrometre
• microsecondbr:Mikro

ca:Micro cs:Mikro da:Mikro-fa:میکرو fr:Micro (préfixe du système international) ko:마이크로 it:Micro (prefisso) he:תחיליות במערכת היחידות הבינלאומית#.D7.9E.D7.99.D7.A7.D7.A8.D7.95 nl:Micro ja:マイクロ no:Mikro nn:Mikroksh:Micro sl:Mikro sr:Микро fi:Mikro sv:Mikro vi:Micrô

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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .