# peta-

> English word · Prefix · IPA /ˈpɛtə/

## Definitions
1. In the metric system, multiplying the unit to which it is attached by 10¹⁵ (a short scale quadrillion or long scale billiard). Symbol: P

## Etymology
Based on penta- (“five”) (from Ancient Greek πέντε (pénte)) with the middle letter removed, analogous to tera-.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/peta