1 giga- | Definition of giga-
\ ˈji-gə How to pronounce giga- (audio) , ˈgi- How to pronounce giga- (audio) \

Definition of giga-

: billion (109) gigahertz gigawatt

History and Etymology for giga-

International Scientific Vocabulary, from Greek gigas giant

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More from Merriam-Webster on giga-

Britannica.com: Encyclopedia article about giga-