from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The action of a catalyst, especially an increase in the rate of a chemical reaction.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The increase of the rate of a chemical reaction induced by a catalyst.
from the GNU version of the Collaborative International Dictionary of English
- n. Dissolution; degeneration; decay.
- n. A process by which a chemical reaction is accelerated in the presence of certain agents which were formerly believed to exert an influence by mere contact. It is now believed that such reactions are attended with the formation of an intermediate compound or compounds, so that by alternate composition and decomposition the agent is apparenty left unchanged.
- n. The catalytic force.
from The Century Dictionary and Cyclopedia
- n. Dissolution; destruction; degeneration; decay.
- n. A decomposition and new combination supposed by Berzelius and other chemists to be produced among the proximate and elementary principles of one or more compounds, by virtue of the mere presence of a substance or substances which do not of themselves enter into the reaction.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction
Greek katalusis, dissolution, from katalūein, to dissolve : kata-, intensive pref.; see cata- + lūein, to loosen; see leu- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek κατάλυσις (katalusis, "dissolution"), from καταλύω (kataluō, "I dissolve"), from κατά (kata, "down") + λύω (luō, "I loose"). (Wiktionary)