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catalysis

 - 4 dictionary results

ca⋅tal⋅y⋅sis

[kuh-tal-uh-sis]
–noun, plural -ses [-seez] .
1. Chemistry. the causing or accelerating of a chemical change by the addition of a catalyst.
2. an action between two or more persons or forces, initiated by an agent that itself remains unaffected by the action: social catalyses occasioned by controversial writings.

Origin:
1645–55; < NL < Gk katálȳsis dissolution, equiv. to katalȳ́(ein) to dissolve (kata- cata- + lȳ́ein to loosen) + -sis -sis


cat⋅a⋅lyt⋅ic [kat-l-it-ik] , adjective, noun
cat⋅a⋅lyt⋅i⋅cal, adjective
cat⋅a⋅lyt⋅i⋅cal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ca·tal·y·sis   (kə-tāl'ĭ-sĭs)   
n.   pl. ca·tal·y·ses (-sēz')
The action of a catalyst, especially an increase in the rate of a chemical reaction.

[Greek katalusis, dissolution, from katalūein, to dissolve : kata-, intensive pref.; see cata- + lūein, to loosen; see leu- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ca·tal·y·sis
Pronunciation: k&-'tal-&-s&s
Function: noun
Inflected Form: plural ca·tal·y·ses /-"sEz/
: a change and especially increase in the rate of a chemical reaction induced by a catalyst
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

catalysis ca·tal·y·sis (kə-tāl'ĭ-sĭs)
n. pl. ca·tal·y·ses (-sēz')
The action of a catalyst, especially an increase in the rate of a chemical reaction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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