noun, plural catalyses [kuh-tal-uh-seez] .
Chemistry. the causing or accelerating of a chemical change by the addition of a catalyst.
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.

1645–55; < Neo-Latin < Greek katálȳsis dissolution, equivalent to katalȳ́(ein) to dissolve (kata- cata- + lȳ́ein to loosen) + -sis -sis

catalytic [kat-l-it-ik] , adjective, noun
catalytical, adjective
catalytically, adverb
anticatalytic, adjective, noun
anticatalytically, adverb
noncatalytic, adjective, noun
noncatalytically, adverb
self-catalysis, noun
semicatalytic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
catalysis (kəˈtælɪsɪs)
n , pl -ses
acceleration of a chemical reaction by the action of a catalyst
[C17: from New Latin, from Greek katalusis, from kataluein to dissolve]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1655, "dissolution," from Gk. katalysis "dissolution," from katalyein "to dissolve," from kata- "down" + lyein "to loosen" (see lose). Chemical sense is attested from 1836.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
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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Example sentences
The real key to the process is catalysis, which enables and speeds up the necessary chemical reactions.
Frankly, unlike inorganic catalysis, synthetic biology is a burgeoning field.
The work could also advance the basic understanding of how changing the shape of particles affects catalysis, he says.
Few might suspect the solution to the world's energy problems will come out of the esoteric field of catalysis science.
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