Definition/Meaning of zetta

• English - Prefix: zetta- In the International System of Units and other metric systems of units , multiplying the unit to which it is attached by 10 21 . Symbol: Z Antonyms zepto- Derived terms zebi- Translations
• English - Etymology: From Ancient Greek ἑπτά ( heptá ), for the seventh order of 10 3 . 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 .
• English - Pronunciation: IPA (key) : /ˈzɛtə/