# picosecond

> English word · Noun · IPA /ˈpiː.kəʊˌsɛk.ənd/

## Definitions
1. An SI unit of time equal to 10⁻¹² seconds. Symbol: ps

## Etymology
From pico- (“metric prefix”) + second.

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