# katal

> English word · Noun

## Definitions
1. In the International System of Units, the derived unit of catalytic activity; one mole per second. Symbol: kat.

## Etymology
From Ancient Greek κατάλυσις (katálusis, “dissolution”), from καταλύω (katalúō, “I dissolve”), from κατά (katá, “down”) + λύω (lúō, “I loose”).

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