# picojoule

> English word · Noun

## Definitions
1. One million millionth ( 10⁻¹² ) of a joule. Symbol: pJ.

## Etymology
From pico- + joule.

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