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".

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

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

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.

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

3 days ago · From New Latin micro- (“small”), from Ancient Greek μικρός (mikrós, “small”).

Definition of 'micro' micro (maɪkroʊ ) adjective [usually ADJECTIVE noun] You use micro to indicate that something relates to a specific area, rather than a general one

micro-, prefix. micro- comes from Greek, where it has the meaning: small or very small in comparison with others of its kind: micro- + organism → microorganism (= very small living creature).