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catalysis

[kuh-tal-uh-sis] /kəˈtæl ə sɪs/
noun, plural catalyses
[kuh-tal-uh-seez] /kəˈtæl əˌsiz/ (Show IPA)
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
1645-1655
1645-55; < Neo-Latin < Greek katálȳsis dissolution, equivalent to katalȳ́(ein) to dissolve (kata- cata- + lȳ́ein to loosen) + -sis -sis
Related forms
catalytic
[kat-l-it-ik] /ˌkæt lˈɪt ɪk/ (Show IPA),
adjective, noun
catalytical, adjective
catalytically, adverb
anticatalytic, adjective, noun
anticatalytically, adverb
noncatalytic, adjective, noun
noncatalytically, adverb
self-catalysis, noun
semicatalytic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for semicatalytic

catalysis

/kəˈtælɪsɪs/
noun (pl) -ses (-ˌsiːz)
1.
acceleration of a chemical reaction by the action of a catalyst
Word Origin
C17: from New Latin, from Greek katalusis, from kataluein to dissolve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for semicatalytic
catalysis
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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semicatalytic in Medicine

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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