Micro (Greek letter μ or the legacy symbol µ (U+00B5)) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth). Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small".. The symbol for the prefix is the Greek letter μ ().It is the only SI prefix which uses a character not from the Latin alphabet. "mc" is commonly used as a prefix ...
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