zetta-

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English[edit]

Etymology[edit]

From Ancient Greek ἑπτά (heptá), 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.

Pronunciation[edit]

Prefix[edit]

SI prefix
Z
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zetta-

  1. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1021. Symbol: Z

Antonyms[edit]

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