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Exa (symbol E) is a unit prefix in the metric system. The prefix denotes a quintillion (1018 or 1 000 000 000 000 000 000).

Usage

See Special:Whatlinkshere/Etymology:Exa for a list of articles using this term.

All Creation
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.
Cosmo Memory
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