# terahertz

> English word · Noun · frequency rank #75,485

## Definitions
1. A unit of measurement based on one trillion hertz.
2. One trillion hertz, 10¹² Hz.

## Etymology
From tera- + hertz.

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