# Lawson criterion

> English word · Noun

## Definitions
1. A necessary, but not sufficient, condition for the achievement of sustained release of energy from a nuclear fusion reactor; that the heating effect of the reaction should exceed the losses.

## Etymology
From John D. Lawson.

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