Zetta-
//ˈzɛtə// prefix
prefix ·Rare ·Advanced level
Definitions
Prefix
- 1 In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10²¹ (a short scale sextillion or long scale trilliard). Symbol: Z morpheme
Antonyms
All antonymsEtymology
Coined with Latin septem and Ancient Greek ἑπτά (heptá, “seven”) in mind, for the seventh order of 10³. The consonants pt are reduced to tt; the initial z was chosen instead of s to avoid confusion with s for second.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.