zetta-

The story

1. Ancient Greek · derived fromἑπτᾰ́“seven”
2. Latin · derived fromseptem“seven”
3. English todayzetta-

Coined with Latin septem (“seven”) and Ancient Greek ἑπτᾰ́ (heptắ, “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 (“second”, symbol)

Words from the same roots