# Mega-

## Metric prefix / From Wikipedia, the free encyclopedia

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**Mega** is a unit prefix in metric systems of units denoting a factor of one million (10^{6} or 1000000). It has the unit symbol **M**. It was confirmed for use in the International System of Units (SI) in 1960. *Mega* comes from Ancient Greek: μέγας, romanized: *mégas*, lit. 'great'.[1]

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*in Wiktionary, the free dictionary.***mega-**