from Wiktionary, Creative Commons Attribution/Share-Alike License.
- prefix In the
International System of Unitsand other metricsystems of units, multiplying the unitto which it is attached by 1021. Symbol: Z
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Ancient Greek ἑπτά (hepta), for the seventh order of 103. The consonants pt are reduced to tt as in Italian, by analogy with peta-; the letter z was added, as a start to running through the alphabet backwards.
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