Everything about Zetta- totally explained
zetta- (symbol
Z) is an
SI prefix in the
SI (
system of units) denoting
1021 or 1 000 000 000 000 000 000 000.
Adopted in 1991, it comes from the
Latin septem, meaning
seven, because it's equal to 1000
7.
A prefix of the same value,
hepa-, was informally introduced a few years before the promulgation of zetta-. It was formed from the Greek ἑπτά,
(hepta), also meaning
seven. It never received official sanction and is now obsolete.
Further Information
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