# permatron

> English word · Noun · IPA /ˈpɜː.məˌtɹɒn/

## Definitions
1. A hot-cathode rectifier with anode current controlled by magnetic field.

## Etymology
From a trade name. Blend of perma(nent) + -tron.

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