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Mega is a unit prefix in metric systems of units denoting a factor of one million (10 6 or 1 000 000). It has the unit symbol M . It was confirmed for use in the International System of Units (SI) in 1960.
Metric prefixes have also been used with some non-metric units. The SI prefixes are metric prefixes that were standardised for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 2022. [1] [2] Since 2009, they have formed part of the ISO/IEC 80000 standard.
mega-, a metric prefix denoting 10 6; Mega (number), a certain very large integer in Steinhaus–Moser notation "mega-" a prefix meaning "large" that is used in taxonomy; Gravity assist, for Moon-Earth gravity assist and Mars-Earth gravity assist
The prefixes of the metric system precede a basic unit of measure to indicate a decadic multiple and fraction of a unit. Each prefix has a unique symbol that is added to the beginning of the unit symbol. Some of the prefixes date back to the introduction of the metric system in the 1790s, but new prefixes have been added, and some have been ...
Several technical numerical prefixes are not derived from words for numbers. (mega-is not derived from a number word, for example.) Similarly, some are only derived from words for numbers inasmuch as they are word play. (Peta-is word play on penta-, for example. See its etymology for details.) The root language of a numerical prefix need not be ...
First, prefixes and suffixes, most of which are derived from ancient Greek or classical Latin, have a droppable vowel, usually -o-. As a general rule, this vowel almost always acts as a joint-stem to connect two consonantal roots (e.g. arthr- + -o- + -logy = arthrology ), but generally, the -o- is dropped when connecting to a vowel-stem (e.g ...
A non-standard but widely used abbreviation for one million (1,000,000) years, using the metric prefix M (for "Mega") to indicate a quantity of one million. When not otherwise qualified, it usually indicates 1,000,000 years Before Present (or 1,000,000 years ago). mafic A silicate mineral or rock that is rich in magnesium and iron. A mnemonic ...
mega (M) (as a prefix to units of semiconductor storage capacity): A multiplier equal to 1 048 576 (2 20 or K 2, where K = 1024). NOTE 1 Contrast with the SI prefix mega (M) equal to 10 6, as in a 1-Mb/s data transfer rate, which is equal to 1 000 000 bits per second.