# Planck temperature

> English word · Noun

## Definitions
1. The fundamental upper limit of temperature conceivable under current models of physics, in which all matter is accelerated as quickly as possible to the speed of light, approximately 1.41679 × 10³² kelvins.

## Etymology
Named after German physicist Max Planck.

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