from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An SI unit of catalytic activity, measured in moles per second. One katal is the catalytic activity that raises the rate of a chemical reaction by one mole per second.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. In the International System of Units, the derived unit of catalytic activity; one mole per second. Symbol: kat.
Greek katal(usis), dissolution; see catalysis.(American Heritage® Dictionary of the English Language, Fourth Edition)