catalysis [k uh- tal- uh-sis] Word Origin noun, plural ca·tal·y·ses . [k uh- tal- uh-seez] /kəˈtæl əˌsiz/ . 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. Origin of catalysis 1645–55;
dissolution, equivalent to
) to dissolve (
to loosen) +
-sis -sis Related forms cat·a·lyt·ic , [kat-l- it-ik] /ˌkæt lˈɪt ɪk/ adjective, noun cat·a·lyt·i·cal, adjective cat·a·lyt·i·cal·ly, adverb an·ti·cat·a·lyt·ic, adjective, noun an·ti·cat·a·lyt·i·cal·ly, adverb non·cat·a·lyt·ic, adjective, noun non·cat·a·lyt·i·cal·ly, adverb self-ca·tal·y·sis, noun sem·i·cat·a·lyt·ic, adjective verb (used with object), cat·a·lyzed, cat·a·lyz·ing. to act upon by catalysis.
, especially British cat·a·lyse. Related forms cat·a·lyz·er, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for catalyses noun plural -ses ( -ˌsiːz) 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
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Word Origin and History for catalyses catalysis n.
1650s, "dissolution," from Latinized form of Greek
katalysis "dissolution, a dissolving" (of governments, military units, etc.), from katalyein "to dissolve," from kata- "down" (or "completely"), see cata-, + lyein "to loosen" (see lose). Chemical sense "change caused by an agent which itself remains unchanged" is attested from 1836, introduced by Swedish chemist Jöns Jakob Berzelius (1779-1848). catalyze v.
1890, back-formation from
catalysis on model of analyze/analysis. Related: Catalyzed; catalyzing. Probably influenced by French catalyser (1842).
Online Etymology Dictionary, © 2010 Douglas Harper
catalysis (kə-tăl ′ĭ-sĭs) n. pl. ca•tal•y•ses ( -sēz′) The action of a catalyst, especially an increase in the rate of a chemical reaction. catalyze (kăt ′l-īz′) To modify, especially to increase, the rate of a chemical reaction by catalysis.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
To modify, especially to increase, the rate of a chemical reaction through the action of a catalyst.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.