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Micro (Greek letter μ, mu, non-italic) 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". It is the only SI prefix which uses a character not from the Latin alphabet.
The meaning of MICRO is very small; especially : microscopic. very small; especially : microscopic; involving minute quantities or variations… See the full definition
MICRO definition: 1. informal for microcomputer 2. very small: 3. 0.000 001 or one millionth of the stated unit: . Learn more.
combining_form. small or minute. microspore. involving the use of a microscope. micrography. indicating a method or instrument for dealing with small quantities. micrometer. (in pathology) indicating abnormal smallness or underdevelopment Compare macro-. microcyte.
