出典:Wiktionary
出典:『Wiktionary』 (2025/04/17 16:53 UTC 版)
Coined with Latin septem and Ancient Greek ἑπτά (heptá, “seven”) in mind, for the seventh order of 10. The consonants pt are reduced to tt; the initial z was chosen instead of s to avoid confusion with s for second.
zetta-
出典:『Wiktionary』 (2010/06/07 19:30 UTC 版)
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.
zetta-