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Micro (Greek letter μ, mu, non- italic) is a unit prefix in the metric system denoting a factor of one millionth (10 −6). [1] It comes from the Greek word μικρός (mikrós), meaning "small".

The meaning of MICRO is very small; especially : microscopic.

Aug 11, 2014 · “Micro is the smallest prefix.” Many assume micro- (μ, 10⁻⁶) is the smallest prefix because it’s commonly used in medicine and biology (e.g., micrometers, micrograms).

Micro is a SI unit prefix in the metric system denoting a factor of 10⁻⁶ (one millionth). It is represented by the prefix micro or the symbol µ.

Add to word list very small: a microbrewery (Definition of micro from the Cambridge Academic Content Dictionary © Cambridge University Press)

1. Very small or microscopic. 2. Basic or small-scale: the economy's performance at the micro level.

Oct 23, 2025 · Micro refers to something very small, often microscopic, and is used in various contexts, including science and technology. It denotes a unit prefix in the metric system representing one …

Jun 25, 2025 · Meaning of micro, a metric system prefix denoting one-millionth. Discover smaller or larger SI units, micro-related tech terms, and more in this article.

Nov 27, 2025 · From New Latin micro- (“small”), from Ancient Greek μικρός (mikrós, “small”).