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)


  • The name, katalize (pronounced cattle-eyes) represents a fusion of the term katal (unit for measuring catalytic activity) and process of catalysis (the acceleration of the reaction rate of a reaction by means of a substance, called a catalyst).



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