Definitions for giga-
This page provides all possible meanings and translations of the word giga-
Random House Webster's College Dictionary
a combining form used in the names of units of measure equal to one billion of a given base unit:
Category: Math, Affix
Origin of giga-:
< Gk gígāsgiant
In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: G
Multiplying the unit to which it is attached by 2 or 1,073,741,824
Origin: From γίγας; cognate to giant.
Giga is a unit prefix in the metric system denoting a factor of a billion. It has the symbol G. Giga is derived from the Greek γίγας, meaning 'giant'. The Oxford English Dictionary reports the earliest written use of giga in this sense to be in the Reports of the IUPAC 14th Conference in 1947: "The following prefixes to abbreviations for the names of units should be used: G giga 109×". When referring to information units in computing, such as gigabit or gigabyte, giga may sometimes mean 1073741824, although such use is contrary to standards and has been discouraged by the standards organizations. The binary prefix gibi has been adopted for 230, while reserving giga exclusively for the metric definition.
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