symbols, acronyms & abbreviations
megaliter: mega- (an SI prefix meaning 1 million) + liter. Used without a period. A symbol in SI, the International System of Units.
The symbol L for liter was adopted in the United States (as an alternative to “l”) to avoid confusion between the numeral “1” and the lowercase letter “l”, since these two characters are identical or very similar in many fonts, especially in typewriting. The CGPM approved “L”as an alternative symbol in 1979 (Resolution 6). Thus an alternative symbol for megaliter, Ml, is also current and approved.
Metric System of Measurement; Interpretation of the
International System of Units for the United States.
Federal Register Dec. 20, 1990. (55 FR 522 42-522 45).
American National Standard ANSI/IEEE Std 268-1982, Metric Practice.
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. For the symbol for the mega- see page 29; for the liter, page 32, especially footnote f.
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Last revised: 17 August 2015.