# petawatt-hour

> English word · Noun

## Definitions
1. A unit of energy equal to that provided by one petawatt of power acting for one hour (3·6 × 10¹⁸ joules).

## Etymology
By surface analysis, petawatt + hour, or, by surface analysis, peta- + watt-hour.

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