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Mega-
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Look up <i>mega-</i> in Wiktionary, the free dictionary. <p>Mega is a <a href="/facts/Metric_prefix/Y2MzkaeL">unit prefix</a> in <a href="/facts/Metric_system/to24H0YK">metric systems</a> of units denoting a factor of one million (106 or <a href="/facts/1000000_(number)/RMGVIm1j">1000000</a>). It has the unit symbol M. It was confirmed for use in the <a href="/facts/International_System_of_Units/S7YLglNz">International System of Units</a> (SI) in 1960. <i>Mega</i> comes from <a href="/facts/Ancient_Greek_language/LIK7NlUh">Ancient Greek</a>: μέγας, <a href="/facts/Romanization_of_Ancient_Greek/KTELT9Aq">romanized</a>: <i>mégas</i>, <a href="/facts/Literal_translation/0cF1oFRh">lit.</a> 'great'. </p>